2 Advanced Linux Sound Architecture - Driver
3 ==========================================
10 To enable ALSA support you need at least to build the kernel with
11 primary sound card support (CONFIG_SOUND). Since ALSA can emulate OSS,
12 you don't have to choose any of the OSS modules.
14 Enable "OSS API emulation" (CONFIG_SND_OSSEMUL) and both OSS mixer and
15 PCM supports if you want to run OSS applications with ALSA.
17 If you want to support the WaveTable functionality on cards such as
18 SB Live! then you need to enable "Sequencer support"
19 (CONFIG_SND_SEQUENCER).
21 To make ALSA debug messages more verbose, enable the "Verbose printk"
22 and "Debug" options. To check for memory leaks, turn on "Debug memory"
23 too. "Debug detection" will add checks for the detection of cards.
25 Please note that all the ALSA ISA drivers support the Linux isapnp API
26 (if the card supports ISA PnP). You don't need to configure the cards
33 This depends on your distribution, but normally you use the /dev/MAKEDEV
34 script to create the necessary device nodes. On some systems you use a
35 script named 'snddevices'.
41 The user can load modules with options. If the module supports more than
42 one card and you have more than one card of the same type then you can
43 specify multiple values for the option separated by commas.
45 Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
50 The core ALSA module. It is used by all ALSA card drivers.
51 It takes the following options which have global effects.
53 major - major number for sound driver
56 - limiting card index for auto-loading (1-8)
58 - For auto-loading more than one card, specify this
59 option together with snd-card-X aliases.
60 slots - Reserve the slot index for the given driver.
61 This option takes multiple strings.
62 See "Module Autoloading Support" section for details.
67 The PCM OSS emulation module.
68 This module takes options which change the mapping of devices.
70 dsp_map - PCM device number maps assigned to the 1st OSS device.
72 adsp_map - PCM device number maps assigned to the 2st OSS device.
75 - Don't block opening busy PCM devices. Default: 1
77 For example, when dsp_map=2, /dev/dsp will be mapped to PCM #2 of
78 the card #0. Similarly, when adsp_map=0, /dev/adsp will be mapped
79 to PCM #0 of the card #0.
80 For changing the second or later card, specify the option with
81 commas, such like "dsp_map=0,1".
83 nonblock_open option is used to change the behavior of the PCM
84 regarding opening the device. When this option is non-zero,
85 opening a busy OSS PCM device won't be blocked but return
86 immediately with EAGAIN (just like O_NONBLOCK flag).
91 This module takes options which change the mapping of devices.
92 similar to those of the snd-pcm-oss module.
94 midi_map - MIDI device number maps assigned to the 1st OSS device.
96 amidi_map - MIDI device number maps assigned to the 2st OSS device.
99 Common parameters for top sound card modules
100 --------------------------------------------
102 Each of top level sound card module takes the following options.
104 index - index (slot #) of sound card
105 - Values: 0 through 31 or negative
106 - If nonnegative, assign that index number
107 - if negative, interpret as a bitmask of permissible
108 indices; the first free permitted index is assigned
110 id - card ID (identifier or name)
111 - Can be up to 15 characters long
112 - Default: the card type
113 - A directory by this name is created under /proc/asound/
114 containing information about the card
115 - This ID can be used instead of the index number in
118 - Default: enabled, for PCI and ISA PnP cards
123 Module for AdLib FM cards.
125 port - port # for OPL chip
127 This module supports multiple cards. It does not support autoprobe, so
128 the port must be specified. For actual AdLib FM cards it will be 0x388.
129 Note that this card does not have PCM support and no mixer; only FM
132 Make sure you have "sbiload" from the alsa-tools package available and,
133 after loading the module, find out the assigned ALSA sequencer port
134 number through "sbiload -l". Example output:
136 Port Client name Port name
137 64:0 OPL2 FM synth OPL2 FM Port
139 Load the std.sb and drums.sb patches also supplied by sbiload:
141 sbiload -p 64:0 std.sb drums.sb
143 If you use this driver to drive an OPL3, you can use std.o3 and drums.o3
144 instead. To have the card produce sound, use aplaymidi from alsa-utils:
146 aplaymidi -p 64:0 foo.mid
151 Module for sound cards based on Analog Devices AD1816A/AD1815 ISA chips.
153 clockfreq - Clock frequency for AD1816A chip (default = 0, 33000Hz)
155 This module supports multiple cards, autoprobe and PnP.
160 Module for sound cards based on AD1848/AD1847/CS4248 ISA chips.
162 port - port # for AD1848 chip
163 irq - IRQ # for AD1848 chip
164 dma1 - DMA # for AD1848 chip (0,1,3)
166 This module supports multiple cards. It does not support autoprobe
167 thus main port must be specified!!! Other ports are optional.
169 The power-management is supported.
174 Module for Analog Devices AD1889 chips.
176 ac97_quirk - AC'97 workaround for strange hardware
177 See the description of intel8x0 module for details.
179 This module supports multiple cards.
184 Module for ALi M5451 PCI chip.
186 pcm_channels - Number of hardware channels assigned for PCM
187 spdif - Support SPDIF I/O
190 This module supports one chip and autoprobe.
192 The power-management is supported.
197 Module for sound cards based on Avance Logic ALS100/ALS120 ISA chips.
199 This module supports multiple cards, autoprobe and PnP.
201 The power-management is supported.
206 Module for Avance Logic ALS300 and ALS300+
208 This module supports multiple cards.
210 The power-management is supported.
215 Module for sound cards based on Avance Logic ALS4000 PCI chip.
217 joystick_port - port # for legacy joystick support.
218 0 = disabled (default), 1 = auto-detect
220 This module supports multiple cards, autoprobe and PnP.
222 The power-management is supported.
227 Module for ATI IXP 150/200/250/400 AC97 controllers.
229 ac97_clock - AC'97 clock (default = 48000)
230 ac97_quirk - AC'97 workaround for strange hardware
231 See "AC97 Quirk Option" section below.
232 ac97_codec - Workaround to specify which AC'97 codec
233 instead of probing. If this works for you
234 file a bug with your `lspci -vn` output.
236 -1 -- Default behavior.
237 0-2 -- Use the specified codec.
238 spdif_aclink - S/PDIF transfer over AC-link (default = 1)
240 This module supports one card and autoprobe.
242 ATI IXP has two different methods to control SPDIF output. One is
243 over AC-link and another is over the "direct" SPDIF output. The
244 implementation depends on the motherboard, and you'll need to
245 choose the correct one via spdif_aclink module option.
247 The power-management is supported.
249 Module snd-atiixp-modem
250 -----------------------
252 Module for ATI IXP 150/200/250 AC97 modem controllers.
254 This module supports one card and autoprobe.
256 Note: The default index value of this module is -2, i.e. the first
259 The power-management is supported.
261 Module snd-au8810, snd-au8820, snd-au8830
262 -----------------------------------------
264 Module for Aureal Vortex, Vortex2 and Advantage device.
266 pcifix - Control PCI workarounds
267 0 = Disable all workarounds
268 1 = Force the PCI latency of the Aureal card to 0xff
269 2 = Force the Extend PCI#2 Internal Master for Efficient
270 Handling of Dummy Requests on the VIA KT133 AGP Bridge
271 3 = Force both settings
272 255 = Autodetect what is required (default)
274 This module supports all ADB PCM channels, ac97 mixer, SPDIF, hardware
275 EQ, mpu401, gameport. A3D and wavetable support are still in development.
276 Development and reverse engineering work is being coordinated at
277 http://savannah.nongnu.org/projects/openvortex/
278 SPDIF output has a copy of the AC97 codec output, unless you use the
279 "spdif" pcm device, which allows raw data passthru.
280 The hardware EQ hardware and SPDIF is only present in the Vortex2 and
283 Note: Some ALSA mixer applications don't handle the SPDIF sample rate
284 control correctly. If you have problems regarding this, try
285 another ALSA compliant mixer (alsamixer works).
290 Module for Audiowerk2 sound card
292 This module supports multiple cards.
297 Module for sound cards based on Aztech System AZT2320 ISA chip (PnP only).
299 This module supports multiple cards, PnP and autoprobe.
301 The power-management is supported.
306 Module for sound cards based on Aztech AZF3328 PCI chip.
308 joystick - Enable joystick (default off)
310 This module supports multiple cards.
315 Module for video cards based on Bt87x chips.
317 digital_rate - Override the default digital rate (Hz)
318 load_all - Load the driver even if the card model isn't known
320 This module supports multiple cards.
322 Note: The default index value of this module is -2, i.e. the first
328 Module for Creative Audigy LS and SB Live 24bit
330 This module supports multiple cards.
336 Module for sound cards based on C-Media CMI8330 ISA chips.
338 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
340 with isapnp=0, the following options are available:
342 wssport - port # for CMI8330 chip (WSS)
343 wssirq - IRQ # for CMI8330 chip (WSS)
344 wssdma - first DMA # for CMI8330 chip (WSS)
345 sbport - port # for CMI8330 chip (SB16)
346 sbirq - IRQ # for CMI8330 chip (SB16)
347 sbdma8 - 8bit DMA # for CMI8330 chip (SB16)
348 sbdma16 - 16bit DMA # for CMI8330 chip (SB16)
350 This module supports multiple cards and autoprobe.
352 The power-management is supported.
357 Module for C-Media CMI8338/8738/8768/8770 PCI sound cards.
359 mpu_port - port address of MIDI interface (8338 only):
360 0x300,0x310,0x320,0x330 = legacy port,
361 0 = disable (default)
362 fm_port - port address of OPL-3 FM synthesizer (8x38 only):
364 1 = integrated PCI port (default on 8738),
366 soft_ac3 - Software-conversion of raw SPDIF packets (model 033 only)
368 joystick_port - Joystick port address (0 = disable, 1 = auto-detect)
370 This module supports autoprobe and multiple cards.
372 The power-management is supported.
377 Module for sound cards based on CS4231 ISA chips.
379 port - port # for CS4231 chip
380 mpu_port - port # for MPU-401 UART (optional), -1 = disable
381 irq - IRQ # for CS4231 chip
382 mpu_irq - IRQ # for MPU-401 UART
383 dma1 - first DMA # for CS4231 chip
384 dma2 - second DMA # for CS4231 chip
386 This module supports multiple cards. This module does not support autoprobe
387 thus main port must be specified!!! Other ports are optional.
389 The power-management is supported.
394 Module for sound cards based on CS4232/CS4232A ISA chips.
396 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
398 with isapnp=0, the following options are available:
400 port - port # for CS4232 chip (PnP setup - 0x534)
401 cport - control port # for CS4232 chip (PnP setup - 0x120,0x210,0xf00)
402 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
403 fm_port - FM port # for CS4232 chip (PnP setup - 0x388), -1 = disable
404 irq - IRQ # for CS4232 chip (5,7,9,11,12,15)
405 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
406 dma1 - first DMA # for CS4232 chip (0,1,3)
407 dma2 - second DMA # for Yamaha CS4232 chip (0,1,3), -1 = disable
409 This module supports multiple cards. This module does not support autoprobe
410 (if ISA PnP is not used) thus main port must be specified!!! Other ports are
413 The power-management is supported.
418 Module for sound cards based on CS4235/CS4236/CS4236B/CS4237B/
419 CS4238B/CS4239 ISA chips.
421 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
423 with isapnp=0, the following options are available:
425 port - port # for CS4236 chip (PnP setup - 0x534)
426 cport - control port # for CS4236 chip (PnP setup - 0x120,0x210,0xf00)
427 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
428 fm_port - FM port # for CS4236 chip (PnP setup - 0x388), -1 = disable
429 irq - IRQ # for CS4236 chip (5,7,9,11,12,15)
430 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
431 dma1 - first DMA # for CS4236 chip (0,1,3)
432 dma2 - second DMA # for CS4236 chip (0,1,3), -1 = disable
434 This module supports multiple cards. This module does not support autoprobe
435 (if ISA PnP is not used) thus main port and control port must be
436 specified!!! Other ports are optional.
438 The power-management is supported.
443 Module for Cirrus Logic CS4281 soundchip.
445 dual_codec - Secondary codec ID (0 = disable, default)
447 This module supports multiple cards.
449 The power-management is supported.
454 Module for PCI sound cards based on CS4610/CS4612/CS4614/CS4615/CS4622/
455 CS4624/CS4630/CS4280 PCI chips.
457 external_amp - Force to enable external amplifier.
458 thinkpad - Force to enable Thinkpad's CLKRUN control.
459 mmap_valid - Support OSS mmap mode (default = 0).
461 This module supports multiple cards and autoprobe.
462 Usually external amp and CLKRUN controls are detected automatically
463 from PCI sub vendor/device ids. If they don't work, give the options
466 The power-management is supported.
471 Module for Cyrix/NatSemi Geode 5530 chip.
473 Module snd-cs5535audio
474 ----------------------
476 Module for multifunction CS5535 companion PCI device
478 The power-management is supported.
483 Module for Echoaudio Darla20
485 This module supports multiple cards.
486 The driver requires the firmware loader support on kernel.
491 Module for Echoaudio Darla24
493 This module supports multiple cards.
494 The driver requires the firmware loader support on kernel.
499 Module for Diamond Technologies DT-019X / Avance Logic ALS-007 (PnP
502 This module supports multiple cards. This module is enabled only with
505 The power-management is supported.
510 Module for the dummy sound card. This "card" doesn't do any output
511 or input, but you may use this module for any application which
512 requires a sound card (like RealPlayer).
514 The power-management is supported.
519 Module for Echoaudio 3G cards (Gina3G/Layla3G)
521 This module supports multiple cards.
522 The driver requires the firmware loader support on kernel.
527 Module for EMU10K1/EMU10k2 based PCI sound cards.
528 * Sound Blaster Live!
529 * Sound Blaster PCI 512
530 * Emu APS (partially supported)
531 * Sound Blaster Audigy
533 extin - bitmap of available external inputs for FX8010 (see bellow)
534 extout - bitmap of available external outputs for FX8010 (see bellow)
535 seq_ports - allocated sequencer ports (4 by default)
536 max_synth_voices - limit of voices used for wavetable (64 by default)
537 max_buffer_size - specifies the maximum size of wavetable/pcm buffers
538 given in MB unit. Default value is 128.
539 enable_ir - enable IR
541 This module supports multiple cards and autoprobe.
543 Input & Output configurations [extin/extout]
544 * Creative Card wo/Digital out [0x0003/0x1f03]
545 * Creative Card w/Digital out [0x0003/0x1f0f]
546 * Creative Card w/Digital CD in [0x000f/0x1f0f]
547 * Creative Card wo/Digital out + LiveDrive [0x3fc3/0x1fc3]
548 * Creative Card w/Digital out + LiveDrive [0x3fc3/0x1fcf]
549 * Creative Card w/Digital CD in + LiveDrive [0x3fcf/0x1fcf]
550 * Creative Card wo/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
551 * Creative Card w/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
552 * Creative Card w/Digital CD in + Digital I/O 2 [0x0fcf/0x1f0f]
553 * Creative Card 5.1/w Digital out + LiveDrive [0x3fc3/0x1fff]
554 * Creative Card 5.1 (c) 2003 [0x3fc3/0x7cff]
555 * Creative Card all ins and outs [0x3fff/0x7fff]
557 The power-management is supported.
562 Module for Creative Emu10k1X (SB Live Dell OEM version)
564 This module supports multiple cards.
569 Module for Ensoniq AudioPCI ES1370 PCI sound cards.
570 * SoundBlaster PCI 64
571 * SoundBlaster PCI 128
573 joystick - Enable joystick (default off)
575 This module supports multiple cards and autoprobe.
577 The power-management is supported.
582 Module for Ensoniq AudioPCI ES1371 PCI sound cards.
583 * SoundBlaster PCI 64
584 * SoundBlaster PCI 128
585 * SoundBlaster Vibra PCI
587 joystick_port - port # for joystick (0x200,0x208,0x210,0x218),
588 0 = disable (default), 1 = auto-detect
590 This module supports multiple cards and autoprobe.
592 The power-management is supported.
597 Module for sound cards based on ESS ES968 chip (PnP only).
599 This module supports multiple cards, PnP and autoprobe.
601 The power-management is supported.
606 Module for ESS AudioDrive ES-1688 and ES-688 sound cards.
608 port - port # for ES-1688 chip (0x220,0x240,0x260)
609 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
610 irq - IRQ # for ES-1688 chip (5,7,9,10)
611 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
612 dma8 - DMA # for ES-1688 chip (0,1,3)
614 This module supports multiple cards and autoprobe (without MPU-401 port).
619 Module for ESS AudioDrive ES-18xx sound cards.
621 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
623 with isapnp=0, the following options are available:
625 port - port # for ES-18xx chip (0x220,0x240,0x260)
626 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
627 fm_port - port # for FM (optional, not used)
628 irq - IRQ # for ES-18xx chip (5,7,9,10)
629 dma1 - first DMA # for ES-18xx chip (0,1,3)
630 dma2 - first DMA # for ES-18xx chip (0,1,3)
632 This module supports multiple cards, ISA PnP and autoprobe (without MPU-401
633 port if native ISA PnP routines are not used).
634 When dma2 is equal with dma1, the driver works as half-duplex.
636 The power-management is supported.
641 Module for sound cards based on ESS Solo-1 (ES1938,ES1946) chips.
643 This module supports multiple cards and autoprobe.
645 The power-management is supported.
650 Module for sound cards based on ESS Maestro-1/2/2E (ES1968/ES1978) chips.
652 total_bufsize - total buffer size in kB (1-4096kB)
653 pcm_substreams_p - playback channels (1-8, default=2)
654 pcm_substreams_c - capture channels (1-8, default=0)
655 clock - clock (0 = auto-detection)
656 use_pm - support the power-management (0 = off, 1 = on,
658 enable_mpu - enable MPU401 (0 = off, 1 = on, 2 = auto (default))
659 joystick - enable joystick (default off)
661 This module supports multiple cards and autoprobe.
663 The power-management is supported.
668 Module for ForteMedia FM801 based PCI sound cards.
670 tea575x_tuner - Enable TEA575x tuner
671 - 1 = MediaForte 256-PCS
672 - 2 = MediaForte 256-PCPR
673 - 3 = MediaForte 64-PCR
674 - High 16-bits are video (radio) device number + 1
675 - example: 0x10002 (MediaForte 256-PCPR, device 1)
677 This module supports multiple cards and autoprobe.
679 The power-management is supported.
684 Module for Echoaudio Gina20
686 This module supports multiple cards.
687 The driver requires the firmware loader support on kernel.
692 Module for Echoaudio Gina24
694 This module supports multiple cards.
695 The driver requires the firmware loader support on kernel.
697 Module snd-gusclassic
698 ---------------------
700 Module for Gravis UltraSound Classic sound card.
702 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
703 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
704 dma1 - DMA # for GF1 chip (1,3,5,6,7)
705 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
706 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
707 voices - GF1 voices limit (14-32)
708 pcm_voices - reserved PCM voices
710 This module supports multiple cards and autoprobe.
712 Module snd-gusextreme
713 ---------------------
715 Module for Gravis UltraSound Extreme (Synergy ViperMax) sound card.
717 port - port # for ES-1688 chip (0x220,0x230,0x240,0x250,0x260)
718 gf1_port - port # for GF1 chip (0x210,0x220,0x230,0x240,0x250,0x260,0x270)
719 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable
720 irq - IRQ # for ES-1688 chip (5,7,9,10)
721 gf1_irq - IRQ # for GF1 chip (3,5,9,11,12,15)
722 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
723 dma8 - DMA # for ES-1688 chip (0,1,3)
724 dma1 - DMA # for GF1 chip (1,3,5,6,7)
725 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
726 voices - GF1 voices limit (14-32)
727 pcm_voices - reserved PCM voices
729 This module supports multiple cards and autoprobe (without MPU-401 port).
734 Module for Gravis UltraSound MAX sound card.
736 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
737 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
738 dma1 - DMA # for GF1 chip (1,3,5,6,7)
739 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
740 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
741 voices - GF1 voices limit (14-32)
742 pcm_voices - reserved PCM voices
744 This module supports multiple cards and autoprobe.
749 Module for Intel HD Audio (ICH6, ICH6M, ESB2, ICH7, ICH8),
750 ATI SB450, SB600, RS600,
754 [Multiple options for each card instance]
755 model - force the model name
756 position_fix - Fix DMA pointer (0 = auto, 1 = none, 2 = POSBUF, 3 = FIFO size)
757 probe_mask - Bitmask to probe codecs (default = -1, meaning all slots)
759 [Single (global) options]
760 single_cmd - Use single immediate commands to communicate with
761 codecs (for debugging only)
762 enable_msi - Enable Message Signaled Interrupt (MSI) (default = off)
763 power_save - Automatic power-saving timtout (in second, 0 =
765 power_save_controller - Reset HD-audio controller in power-saving mode
768 This module supports multiple cards and autoprobe.
770 Each codec may have a model table for different configurations.
771 If your machine isn't listed there, the default (usually minimal)
772 configuration is set up. You can pass "model=<name>" option to
773 specify a certain model in such a case. There are different
774 models depending on the codec chip.
776 Model name Description
777 ---------- -----------
779 3stack 3-jack in back and a headphone out
780 3stack-digout 3-jack in back, a HP out and a SPDIF out
781 5stack 5-jack in back, 2-jack in front
782 5stack-digout 5-jack in back, 2-jack in front, a SPDIF out
783 6stack 6-jack in back, 2-jack in front
784 6stack-digout 6-jack with a SPDIF out
786 z71v 3-jack (HP shared SPDIF)
787 asus 3-jack (ASUS Mobo)
789 asus-dig ASUS with SPDIF out
790 asus-dig2 ASUS with SPDIF out (using GPIO2)
792 fujitsu Fujitsu Laptops (Pi1536)
794 lg LG laptop (m1 express dual)
795 lg-lw LG LW20/LW25 laptop
797 clevo Clevo laptops (m520G, m665n)
798 test for testing/debugging purpose, almost all controls can be
799 adjusted. Appearing only when compiled with
801 auto auto-config reading BIOS (default)
805 hp-3013 HP machines (3013-variant)
806 fujitsu Fujitsu S7020
808 will Will laptops (PB V7900)
809 replacer Replacer 672V
810 basic fixed pin assignment (old default model)
811 test for testing/debugging purpose, almost all controls can
812 adjusted. Appearing only when compiled with
814 auto auto-config reading BIOS (default)
817 fujitsu Fujitsu Laptop
818 hp-bpc HP xw4400/6400/8400/9400 laptops
819 hp-bpc-d7000 HP BPC D7000
820 hp-tc-t5735 HP Thin Client T5735
824 hippo Hippo (ATI) with jack detection, Sony UX-90s
825 hippo_1 Hippo (Benq) with jack detection
826 sony-assamd Sony ASSAMD
827 ultra Samsung Q1 Ultra Vista model
828 lenovo-3000 Lenovo 3000 y410
829 basic fixed pin assignment w/o SPDIF
830 auto auto-config reading BIOS (default)
833 quanta-il1 Quanta IL1 mini-notebook
837 dell Dell OEM laptops (Vostro 1200)
839 test for testing/debugging purpose, almost all controls can
840 adjusted. Appearing only when compiled with
842 auto auto-config reading BIOS (default)
848 3stack-dig 3-stack (2-channel) with SPDIF
849 3stack-6ch 3-stack (6-channel)
850 3stack-6ch-dig 3-stack (6-channel) with SPDIF
851 6stack-dig 6-stack with SPDIF
852 lenovo-101e Lenovo laptop
853 eeepc-p701 ASUS Eeepc P701
854 eeepc-ep20 ASUS Eeepc EP20
855 auto auto-config reading BIOS (default)
858 3stack-dig 3-jack with SPDIF I/O
859 6stack-dig 6-jack digital with SPDIF I/O
861 targa Targa T8, MSI-1049 T8
864 macpro MacPro support
865 mbp3 Macbook Pro rev3
866 imac24 iMac 24'' with jack detection
868 auto auto-config reading BIOS (default)
871 3stack-dig 3-jack with SPDIF I/O
872 6stack-dig 6-jack digital with SPDIF I/O
873 3stack-6ch 3-jack 6-channel
874 3stack-6ch-dig 3-jack 6-channel with SPDIF I/O
875 6stack-dig-demo 6-jack digital for Intel demo board
876 acer Acer laptops (Travelmate 3012WTMi, Aspire 5600, etc)
877 acer-aspire Acer Aspire 9810
878 medion Medion Laptops
879 medion-md2 Medion MD2
881 targa-2ch-dig Targs/MSI with 2-channel
882 laptop-eapd 3-jack with SPDIF I/O and EAPD (Clevo M540JE, M550JE)
883 lenovo-101e Lenovo 101E
884 lenovo-nb0763 Lenovo NB0763
885 lenovo-ms7195-dig Lenovo MS7195
887 3stack-hp HP machines with 3stack (Lucknow, Samba boards)
888 6stack-dell Dell machines with 6stack (Inspiron 530)
890 clevo-m720 Clevo M720 laptop series
891 fujitsu-pi2515 Fujitsu AMILO Pi2515
892 auto auto-config reading BIOS (default)
896 3stack-dig 3-jack with SPDIF I/O
897 6stack-dig 6-jack with SPDIF I/O
898 3stack-660 3-jack (for ALC660)
899 uniwill-m31 Uniwill M31 laptop
900 toshiba Toshiba laptop support
901 asus Asus laptop support
902 asus-laptop ASUS F2/F3 laptops
903 auto auto-config reading BIOS (default)
907 3stack-dig 3-jack with SPDIF OUT
908 6stack-dig 6-jack with SPDIF OUT
909 3stack-660 3-jack (for ALC660VD)
910 3stack-660-digout 3-jack with SPDIF OUT (for ALC660VD)
911 lenovo Lenovo 3000 C200
912 dallas Dallas laptops
914 auto auto-config reading BIOS (default)
917 minimal 3-jack in back
918 min_fp 3-jack in back, 2-jack in front
919 full 6-jack in back, 2-jack in front
920 full_dig 6-jack in back, 2-jack in front, SPDIF I/O
921 allout 5-jack in back, 2-jack in front, SPDIF out
922 auto auto-config reading BIOS (default)
925 3stack 3-stack mode (default)
928 AD1884A / AD1883 / AD1984A / AD1984B
929 desktop 3-stack desktop (default)
930 laptop laptop with HP jack sensing
931 mobile mobile devices with HP jack sensing
932 thinkpad Lenovo Thinkpad X300
938 basic 3-jack (default)
940 thinkpad Lenovo Thinkpad T60/X60/Z60
947 basic default configuration
948 thinkpad Lenovo Thinkpad T61/X61
952 6stack 6-jack, separate surrounds (default)
953 3stack 3-stack, shared surrounds
954 laptop 2-channel only (FSC V2060, Samsung M50)
955 laptop-eapd 2-channel with EAPD (Samsung R65, ASUS A6J)
956 laptop-automute 2-channel with EAPD and HP-automute (Lenovo N100)
957 ultra 2-channel with EAPD (Samsung Ultra tablet PC)
961 6stack-dig ditto with SPDIF
963 3stack-dig ditto with SPDIF
964 laptop 3-jack with hp-jack automute
965 laptop-dig ditto with SPDIF
966 auto auto-config reading BIOS (default)
969 laptop-hpsense Laptop with HP sense (old model laptop)
970 laptop-micsense Laptop with Mic sense (old model fujitsu)
971 laptop-hpmicsense Laptop with HP and Mic senses
973 test for testing/debugging purpose, almost all controls
974 can be adjusted. Appearing only when compiled with
978 laptop Basic Laptop config
979 laptop-hp Laptop config for some HP models (subdevice 30A5)
980 laptop-eapd Laptop config with EAPD support
981 test for testing/debugging purpose, almost all controls
982 can be adjusted. Appearing only when compiled with
986 laptop Basic Laptop config (default)
991 dell-d21 Dell (unknown)
992 dell-d22 Dell (unknown)
993 dell-d23 Dell (unknown)
994 dell-m21 Dell Inspiron 630m, Dell Inspiron 640m
995 dell-m22 Dell Latitude D620, Dell Latitude D820
996 dell-m23 Dell XPS M1710, Dell Precision M90
997 dell-m24 Dell Latitude 120L
998 dell-m25 Dell Inspiron E1505n
999 dell-m26 Dell Inspiron 1501
1000 dell-m27 Dell Inspiron E1705/9400
1001 gateway Gateway laptops with EAPD control
1002 panasonic Panasonic CF-74
1006 dell-m42 Dell (unknown)
1007 dell-m43 Dell Precision
1008 dell-m44 Dell Inspiron
1013 5stack D945 5stack + SPDIF
1014 intel-mac-v1 Intel Mac Type 1
1015 intel-mac-v2 Intel Mac Type 2
1016 intel-mac-v3 Intel Mac Type 3
1017 intel-mac-v4 Intel Mac Type 4
1018 intel-mac-v5 Intel Mac Type 5
1019 macmini Intel Mac Mini (equivalent with type 3)
1020 macbook Intel Mac Book (eq. type 5)
1021 macbook-pro-v1 Intel Mac Book Pro 1st generation (eq. type 3)
1022 macbook-pro Intel Mac Book Pro 2nd generation (eq. type 3)
1023 imac-intel Intel iMac (eq. type 2)
1024 imac-intel-20 Intel iMac (newer version) (eq. type 3)
1025 dell-d81 Dell (unknown)
1026 dell-d82 Dell (unknown)
1027 dell-m81 Dell (unknown)
1028 dell-m82 Dell XPS M1210
1031 ref Reference board, base config
1032 m2-2 Some Gateway MX series laptops
1033 m6 Some Gateway NX series laptops
1034 pa6 Gateway NX860 series
1036 STAC9227/9228/9229/927x
1039 5stack D965 5stack + SPDIF
1040 dell-3stack Dell Dimension E520
1041 dell-bios Fixes with Dell BIOS setup
1045 dell-m4-1 Dell desktops
1046 dell-m4-2 Dell desktops
1050 dell-m6 Dell desktops
1053 vaio Setup for VAIO FE550G/SZ110
1054 vaio-ar Setup for VAIO AR
1056 The model name "genric" is treated as a special case. When this
1057 model is given, the driver uses the generic codec parser without
1058 "codec-patch". It's sometimes good for testing and debugging.
1060 If the default configuration doesn't work and one of the above
1061 matches with your device, report it together with the PCI
1062 subsystem ID (output of "lspci -nv") to ALSA BTS or alsa-devel
1063 ML (see the section "Links and Addresses").
1065 power_save and power_save_controller options are for power-saving
1066 mode. See powersave.txt for details.
1068 Note 2: If you get click noises on output, try the module option
1069 position_fix=1 or 2. position_fix=1 will use the SD_LPIB
1070 register value without FIFO size correction as the current
1071 DMA pointer. position_fix=2 will make the driver to use
1072 the position buffer instead of reading SD_LPIB register.
1073 (Usually SD_LPLIB register is more accurate than the
1076 NB: If you get many "azx_get_response timeout" messages at
1077 loading, it's likely a problem of interrupts (e.g. ACPI irq
1078 routing). Try to boot with options like "pci=noacpi". Also, you
1079 can try "single_cmd=1" module option. This will switch the
1080 communication method between HDA controller and codecs to the
1081 single immediate commands instead of CORB/RIRB. Basically, the
1082 single command mode is provided only for BIOS, and you won't get
1083 unsolicited events, too. But, at least, this works independently
1084 from the irq. Remember this is a last resort, and should be
1085 avoided as much as possible...
1087 MORE NOTES ON "azx_get_response timeout" PROBLEMS:
1088 On some hardwares, you may need to add a proper probe_mask option
1089 to avoid the "azx_get_response timeout" problem above, instead.
1090 This occurs when the access to non-existing or non-working codec slot
1091 (likely a modem one) causes a stall of the communication via HD-audio
1092 bus. You can see which codec slots are probed by enabling
1093 CONFIG_SND_DEBUG_DETECT, or simply from the file name of the codec
1094 proc files. Then limit the slots to probe by probe_mask option.
1095 For example, probe_mask=1 means to probe only the first slot, and
1096 probe_mask=4 means only the third slot.
1098 The power-management is supported.
1103 Module for RME Hammerfall DSP audio interface(s)
1105 This module supports multiple cards.
1107 Note: The firmware data can be automatically loaded via hotplug
1108 when CONFIG_FW_LOADER is set. Otherwise, you need to load
1109 the firmware via hdsploader utility included in alsa-tools
1111 The firmware data is found in alsa-firmware package.
1113 Note: snd-page-alloc module does the job which snd-hammerfall-mem
1114 module did formerly. It will allocate the buffers in advance
1115 when any HDSP cards are found. To make the buffer
1116 allocation sure, load snd-page-alloc module in the early
1117 stage of boot sequence. See "Early Buffer Allocation"
1123 Module for RME HDSP MADI board.
1125 precise_ptr - Enable precise pointer, or disable.
1126 line_outs_monitor - Send playback streams to analog outs by default.
1127 enable_monitor - Enable Analog Out on Channel 63/64 by default.
1129 See hdspm.txt for details.
1134 Module for the MediaTek/TempoTec HiFier Fantasia sound card.
1136 This module supports autoprobe and multiple cards.
1138 Power management is _not_ supported.
1143 Module for Envy24 (ICE1712) based PCI sound cards.
1144 * MidiMan M Audio Delta 1010
1145 * MidiMan M Audio Delta 1010LT
1146 * MidiMan M Audio Delta DiO 2496
1147 * MidiMan M Audio Delta 66
1148 * MidiMan M Audio Delta 44
1149 * MidiMan M Audio Delta 410
1150 * MidiMan M Audio Audiophile 2496
1153 * TerraTec EWX 24/96
1154 * TerraTec DMX 6Fire
1156 * Hoontech SoundTrack DSP 24
1157 * Hoontech SoundTrack DSP 24 Value
1158 * Hoontech SoundTrack DSP 24 Media 7.1
1159 * Event Electronics, EZ8
1161 * Lionstracs, Mediastaton
1163 model - Use the given board model, one of the following:
1164 delta1010, dio2496, delta66, delta44, audiophile, delta410,
1165 delta1010lt, vx442, ewx2496, ews88mt, ews88mt_new, ews88d,
1166 dmx6fire, dsp24, dsp24_value, dsp24_71, ez8,
1167 phase88, mediastation
1168 omni - Omni I/O support for MidiMan M-Audio Delta44/66
1169 cs8427_timeout - reset timeout for the CS8427 chip (S/PDIF transceiver)
1170 in msec resolution, default value is 500 (0.5 sec)
1172 This module supports multiple cards and autoprobe. Note: The consumer part
1173 is not used with all Envy24 based cards (for example in the MidiMan Delta
1176 Note: The supported board is detected by reading EEPROM or PCI
1177 SSID (if EEPROM isn't available). You can override the
1178 model by passing "model" module option in case that the
1179 driver isn't configured properly or you want to try another
1185 Module for Envy24HT (VT/ICE1724), Envy24PT (VT1720) based PCI sound cards.
1186 * MidiMan M Audio Revolution 5.1
1187 * MidiMan M Audio Revolution 7.1
1188 * MidiMan M Audio Audiophile 192
1190 * TerraTec Aureon 5.1 Sky
1191 * TerraTec Aureon 7.1 Space
1192 * TerraTec Aureon 7.1 Universe
1195 * AudioTrak Prodigy 7.1
1196 * AudioTrak Prodigy 7.1LT
1197 * AudioTrak Prodigy 192
1199 * Albatron K8X800 Pro II
1200 * Chaintech ZNF3-150
1201 * Chaintech ZNF3-250
1208 model - Use the given board model, one of the following:
1209 revo51, revo71, amp2000, prodigy71, prodigy71lt,
1210 prodigy192, aureon51, aureon71, universe, ap192,
1211 k8x800, phase22, phase28, ms300, av710, se200pci,
1214 This module supports multiple cards and autoprobe.
1216 Note: The supported board is detected by reading EEPROM or PCI
1217 SSID (if EEPROM isn't available). You can override the
1218 model by passing "model" module option in case that the
1219 driver isn't configured properly or you want to try another
1225 Module for Echoaudio Indigo
1227 This module supports multiple cards.
1228 The driver requires the firmware loader support on kernel.
1233 Module for Echoaudio Indigo DJ
1235 This module supports multiple cards.
1236 The driver requires the firmware loader support on kernel.
1241 Module for Echoaudio Indigo IO
1243 This module supports multiple cards.
1244 The driver requires the firmware loader support on kernel.
1249 Module for AC'97 motherboards from Intel and compatibles.
1250 * Intel i810/810E, i815, i820, i830, i84x, MX440
1251 ICH5, ICH6, ICH7, ESB2
1252 * SiS 7012 (SiS 735)
1253 * NVidia NForce, NForce2, NForce3, MCP04, CK804
1255 * AMD AMD768, AMD8111
1258 ac97_clock - AC'97 codec clock base (0 = auto-detect)
1259 ac97_quirk - AC'97 workaround for strange hardware
1260 See "AC97 Quirk Option" section below.
1261 buggy_irq - Enable workaround for buggy interrupts on some
1262 motherboards (default yes on nForce chips,
1264 buggy_semaphore - Enable workaround for hardwares with buggy
1265 semaphores (e.g. on some ASUS laptops)
1267 spdif_aclink - Use S/PDIF over AC-link instead of direct connection
1268 from the controller chip
1269 (0 = off, 1 = on, -1 = default)
1271 This module supports one chip and autoprobe.
1273 Note: the latest driver supports auto-detection of chip clock.
1274 if you still encounter too fast playback, specify the clock
1275 explicitly via the module option "ac97_clock=41194".
1277 Joystick/MIDI ports are not supported by this driver. If your
1278 motherboard has these devices, use the ns558 or snd-mpu401
1279 modules, respectively.
1281 The power-management is supported.
1283 Module snd-intel8x0m
1284 --------------------
1286 Module for Intel ICH (i8x0) chipset MC97 modems.
1287 * Intel i810/810E, i815, i820, i830, i84x, MX440
1289 * SiS 7013 (SiS 735)
1290 * NVidia NForce, NForce2, NForce2s, NForce3
1294 ac97_clock - AC'97 codec clock base (0 = auto-detect)
1296 This module supports one card and autoprobe.
1298 Note: The default index value of this module is -2, i.e. the first
1301 The power-management is supported.
1303 Module snd-interwave
1304 --------------------
1306 Module for Gravis UltraSound PnP, Dynasonic 3-D/Pro, STB Sound Rage 32
1307 and other sound cards based on AMD InterWave (tm) chip.
1309 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
1310 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
1311 pcm_voices - reserved PCM voices for the synthesizer (default 2)
1312 effect - 1 = InterWave effects enable (default 0);
1314 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1316 with isapnp=0, the following options are available:
1318 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
1319 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
1320 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
1321 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
1323 This module supports multiple cards, autoprobe and ISA PnP.
1325 Module snd-interwave-stb
1326 ------------------------
1328 Module for UltraSound 32-Pro (sound card from STB used by Compaq)
1329 and other sound cards based on AMD InterWave (tm) chip with TEA6330T
1330 circuit for extended control of bass, treble and master volume.
1332 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
1333 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
1334 pcm_voices - reserved PCM voices for the synthesizer (default 2)
1335 effect - 1 = InterWave effects enable (default 0);
1337 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1339 with isapnp=0, the following options are available:
1341 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
1342 port_tc - tone control (i2c bus) port # for TEA6330T chip (0x350,0x360,0x370,0x380)
1343 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
1344 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
1345 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
1347 This module supports multiple cards, autoprobe and ISA PnP.
1352 Module for Korg 1212 IO PCI card
1354 This module supports multiple cards.
1359 Module for Echoaudio Layla20
1361 This module supports multiple cards.
1362 The driver requires the firmware loader support on kernel.
1367 Module for Echoaudio Layla24
1369 This module supports multiple cards.
1370 The driver requires the firmware loader support on kernel.
1375 Module for Allegro/Maestro3 chips
1377 external_amp - enable external amp (enabled by default)
1378 amp_gpio - GPIO pin number for external amp (0-15) or
1379 -1 for default pin (8 for allegro, 1 for
1382 This module supports autoprobe and multiple chips.
1384 Note: the binding of amplifier is dependent on hardware.
1385 If there is no sound even though all channels are unmuted, try to
1386 specify other gpio connection via amp_gpio option.
1387 For example, a Panasonic notebook might need "amp_gpio=0x0d"
1390 The power-management is supported.
1395 Module for Echoaudio Mia
1397 This module supports multiple cards.
1398 The driver requires the firmware loader support on kernel.
1403 Module for Miro soundcards: miroSOUND PCM 1 pro,
1405 miroSOUND PCM 20 Radio.
1407 port - Port # (0x530,0x604,0xe80,0xf40)
1408 irq - IRQ # (5,7,9,10,11)
1409 dma1 - 1st dma # (0,1,3)
1410 dma2 - 2nd dma # (0,1)
1411 mpu_port - MPU-401 port # (0x300,0x310,0x320,0x330)
1412 mpu_irq - MPU-401 irq # (5,7,9,10)
1413 fm_port - FM Port # (0x388)
1414 wss - enable WSS mode
1415 ide - enable onboard ide support
1420 Module for Digigram miXart8 sound cards.
1422 This module supports multiple cards.
1423 Note: One miXart8 board will be represented as 4 alsa cards.
1424 See MIXART.txt for details.
1426 When the driver is compiled as a module and the hotplug firmware
1427 is supported, the firmware data is loaded via hotplug automatically.
1428 Install the necessary firmware files in alsa-firmware package.
1429 When no hotplug fw loader is available, you need to load the
1430 firmware via mixartloader utility in alsa-tools package.
1435 Module for Echoaudio Mona
1437 This module supports multiple cards.
1438 The driver requires the firmware loader support on kernel.
1443 Module for MPU-401 UART devices.
1445 port - port number or -1 (disable)
1446 irq - IRQ number or -1 (disable)
1447 pnp - PnP detection - 0 = disable, 1 = enable (default)
1449 This module supports multiple devices and PnP.
1454 Module for MOTU MidiTimePiece AV multiport MIDI (on the parallel
1457 port - I/O port # for MTPAV (0x378,0x278, default=0x378)
1458 irq - IRQ # for MTPAV (7,5, default=7)
1459 hwports - number of supported hardware ports, default=8.
1461 Module supports only 1 card. This module has no enable option.
1466 Module for Ego Systems (ESI) Miditerminal 4140
1468 This module supports multiple devices.
1469 Requires parport (CONFIG_PARPORT).
1474 Module for NeoMagic NM256AV/ZX chips
1476 playback_bufsize - max playback frame size in kB (4-128kB)
1477 capture_bufsize - max capture frame size in kB (4-128kB)
1478 force_ac97 - 0 or 1 (disabled by default)
1479 buffer_top - specify buffer top address
1480 use_cache - 0 or 1 (disabled by default)
1481 vaio_hack - alias buffer_top=0x25a800
1482 reset_workaround - enable AC97 RESET workaround for some laptops
1483 reset_workaround2 - enable extended AC97 RESET workaround for some
1486 This module supports one chip and autoprobe.
1488 The power-management is supported.
1490 Note: on some notebooks the buffer address cannot be detected
1491 automatically, or causes hang-up during initialization.
1492 In such a case, specify the buffer top address explicitly via
1493 the buffer_top option.
1495 Sony F250: buffer_top=0x25a800
1496 Sony F270: buffer_top=0x272800
1497 The driver supports only ac97 codec. It's possible to force
1498 to initialize/use ac97 although it's not detected. In such a
1499 case, use force_ac97=1 option - but *NO* guarantee whether it
1502 Note: The NM256 chip can be linked internally with non-AC97
1503 codecs. This driver supports only the AC97 codec, and won't work
1504 with machines with other (most likely CS423x or OPL3SAx) chips,
1505 even though the device is detected in lspci. In such a case, try
1506 other drivers, e.g. snd-cs4232 or snd-opl3sa2. Some has ISA-PnP
1507 but some doesn't have ISA PnP. You'll need to specify isapnp=0
1508 and proper hardware parameters in the case without ISA PnP.
1510 Note: some laptops need a workaround for AC97 RESET. For the
1511 known hardware like Dell Latitude LS and Sony PCG-F305, this
1512 workaround is enabled automatically. For other laptops with a
1513 hard freeze, you can try reset_workaround=1 option.
1515 Note: Dell Latitude CSx laptops have another problem regarding
1516 AC97 RESET. On these laptops, reset_workaround2 option is
1517 turned on as default. This option is worth to try if the
1518 previous reset_workaround option doesn't help.
1520 Note: This driver is really crappy. It's a porting from the
1521 OSS driver, which is a result of black-magic reverse engineering.
1522 The detection of codec will fail if the driver is loaded *after*
1523 X-server as described above. You might be able to force to load
1524 the module, but it may result in hang-up. Hence, make sure that
1525 you load this module *before* X if you encounter this kind of
1531 Module for Yamaha OPL3-SA2/SA3 sound cards.
1533 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1535 with isapnp=0, the following options are available:
1537 port - control port # for OPL3-SA chip (0x370)
1538 sb_port - SB port # for OPL3-SA chip (0x220,0x240)
1539 wss_port - WSS port # for OPL3-SA chip (0x530,0xe80,0xf40,0x604)
1540 midi_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1541 fm_port - FM port # for OPL3-SA chip (0x388), -1 = disable
1542 irq - IRQ # for OPL3-SA chip (5,7,9,10)
1543 dma1 - first DMA # for Yamaha OPL3-SA chip (0,1,3)
1544 dma2 - second DMA # for Yamaha OPL3-SA chip (0,1,3), -1 = disable
1546 This module supports multiple cards and ISA PnP. It does not support
1547 autoprobe (if ISA PnP is not used) thus all ports must be specified!!!
1549 The power-management is supported.
1551 Module snd-opti92x-ad1848
1552 -------------------------
1554 Module for sound cards based on OPTi 82c92x and Analog Devices AD1848 chips.
1555 Module works with OAK Mozart cards as well.
1557 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1559 with isapnp=0, the following options are available:
1561 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1562 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1563 fm_port - port # for OPL3 device (0x388)
1564 irq - IRQ # for WSS chip (5,7,9,10,11)
1565 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1566 dma1 - first DMA # for WSS chip (0,1,3)
1568 This module supports only one card, autoprobe and PnP.
1570 Module snd-opti92x-cs4231
1571 -------------------------
1573 Module for sound cards based on OPTi 82c92x and Crystal CS4231 chips.
1575 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1577 with isapnp=0, the following options are available:
1579 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1580 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1581 fm_port - port # for OPL3 device (0x388)
1582 irq - IRQ # for WSS chip (5,7,9,10,11)
1583 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1584 dma1 - first DMA # for WSS chip (0,1,3)
1585 dma2 - second DMA # for WSS chip (0,1,3)
1587 This module supports only one card, autoprobe and PnP.
1592 Module for sound cards based on OPTi 82c93x chips.
1594 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1596 with isapnp=0, the following options are available:
1598 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1599 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1600 fm_port - port # for OPL3 device (0x388)
1601 irq - IRQ # for WSS chip (5,7,9,10,11)
1602 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1603 dma1 - first DMA # for WSS chip (0,1,3)
1604 dma2 - second DMA # for WSS chip (0,1,3)
1606 This module supports only one card, autoprobe and PnP.
1611 Module for sound cards based on the C-Media CMI8788 chip:
1613 * AuzenTech X-Meridian
1615 * Club3D Theatron DTS
1617 * Razer Barracuda AC-1
1620 This module supports autoprobe and multiple cards.
1622 Power management is _not_ supported.
1627 Module for internal PC-Speaker.
1629 nforce_wa - enable NForce chipset workaround. Expect bad sound.
1631 This module supports system beeps, some kind of PCM playback and
1632 even a few mixer controls.
1637 Module for Digigram PCXHR boards
1639 This module supports multiple cards.
1641 Module snd-portman2x4
1642 ---------------------
1644 Module for Midiman Portman 2x4 parallel port MIDI interface
1646 This module supports multiple cards.
1648 Module snd-powermac (on ppc only)
1649 ---------------------------------
1651 Module for PowerMac, iMac and iBook on-board soundchips
1653 enable_beep - enable beep using PCM (enabled as default)
1655 Module supports autoprobe a chip.
1657 Note: the driver may have problems regarding endianess.
1659 The power-management is supported.
1661 Module snd-pxa2xx-ac97 (on arm only)
1662 ------------------------------------
1664 Module for AC97 driver for the Intel PXA2xx chip
1666 For ARM architecture only.
1668 The power-management is supported.
1673 Module for Conexant Riptide chip
1675 joystick_port - Joystick port # (default: 0x200)
1676 mpu_port - MPU401 port # (default: 0x330)
1677 opl3_port - OPL3 port # (default: 0x388)
1679 This module supports multiple cards.
1680 The driver requires the firmware loader support on kernel.
1681 You need to install the firmware file "riptide.hex" to the standard
1682 firmware path (e.g. /lib/firmware).
1687 Module for RME Digi32, Digi32 Pro and Digi32/8 (Sek'd Prodif32,
1688 Prodif96 and Prodif Gold) sound cards.
1690 This module supports multiple cards.
1695 Module for RME Digi96, Digi96/8 and Digi96/8 PRO/PAD/PST sound cards.
1697 This module supports multiple cards.
1702 Module for RME Digi9652 (Hammerfall, Hammerfall-Light) sound cards.
1704 precise_ptr - Enable precise pointer (doesn't work reliably).
1707 This module supports multiple cards.
1709 Note: snd-page-alloc module does the job which snd-hammerfall-mem
1710 module did formerly. It will allocate the buffers in advance
1711 when any RME9652 cards are found. To make the buffer
1712 allocation sure, load snd-page-alloc module in the early
1713 stage of boot sequence. See "Early Buffer Allocation"
1716 Module snd-sa11xx-uda1341 (on arm only)
1717 ---------------------------------------
1719 Module for Philips UDA1341TS on Compaq iPAQ H3600 sound card.
1721 Module supports only one card.
1722 Module has no enable and index options.
1724 The power-management is supported.
1729 Module for 8-bit SoundBlaster cards: SoundBlaster 1.0,
1733 port - port # for SB DSP chip (0x220,0x240,0x260)
1734 irq - IRQ # for SB DSP chip (5,7,9,10)
1735 dma8 - DMA # for SB DSP chip (1,3)
1737 This module supports multiple cards and autoprobe.
1739 The power-management is supported.
1741 Module snd-sb16 and snd-sbawe
1742 -----------------------------
1744 Module for 16-bit SoundBlaster cards: SoundBlaster 16 (PnP),
1745 SoundBlaster AWE 32 (PnP),
1746 SoundBlaster AWE 64 PnP
1748 mic_agc - Mic Auto-Gain-Control - 0 = disable, 1 = enable (default)
1749 csp - ASP/CSP chip support - 0 = disable (default), 1 = enable
1750 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1752 with isapnp=0, the following options are available:
1754 port - port # for SB DSP 4.x chip (0x220,0x240,0x260)
1755 mpu_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1756 awe_port - base port # for EMU8000 synthesizer (0x620,0x640,0x660)
1757 (snd-sbawe module only)
1758 irq - IRQ # for SB DSP 4.x chip (5,7,9,10)
1759 dma8 - 8-bit DMA # for SB DSP 4.x chip (0,1,3)
1760 dma16 - 16-bit DMA # for SB DSP 4.x chip (5,6,7)
1762 This module supports multiple cards, autoprobe and ISA PnP.
1764 Note: To use Vibra16X cards in 16-bit half duplex mode, you must
1765 disable 16bit DMA with dma16 = -1 module parameter.
1766 Also, all Sound Blaster 16 type cards can operate in 16-bit
1767 half duplex mode through 8-bit DMA channel by disabling their
1770 The power-management is supported.
1775 Module for Gallant SC-6000 soundcard.
1777 port - Port # (0x220 or 0x240)
1778 mss_port - MSS Port # (0x530 or 0xe80)
1779 irq - IRQ # (5,7,9,10,11)
1780 mpu_irq - MPU-401 IRQ # (5,7,9,10) ,0 - no MPU-401 irq
1783 This module supports multiple cards.
1785 This card is also known as Audio Excel DSP 16 or Zoltrix AV302.
1790 Module for Aztech Sound Galaxy sound card.
1792 sbport - Port # for SB16 interface (0x220,0x240)
1793 wssport - Port # for WSS interface (0x530,0xe80,0xf40,0x604)
1794 irq - IRQ # (7,9,10,11)
1797 This module supports multiple cards.
1799 The power-management is supported.
1804 Module for ENSONIQ SoundScape PnP cards.
1806 port - Port # (PnP setup)
1807 wss_port - WSS Port # (PnP setup)
1808 irq - IRQ # (PnP setup)
1809 mpu_irq - MPU-401 IRQ # (PnP setup)
1810 dma - DMA # (PnP setup)
1811 dma2 - 2nd DMA # (PnP setup, -1 to disable)
1813 This module supports multiple cards. ISA PnP must be enabled.
1814 You need sscape_ctl tool in alsa-tools package for loading
1817 Module snd-sun-amd7930 (on sparc only)
1818 --------------------------------------
1820 Module for AMD7930 sound chips found on Sparcs.
1822 This module supports multiple cards.
1824 Module snd-sun-cs4231 (on sparc only)
1825 -------------------------------------
1827 Module for CS4231 sound chips found on Sparcs.
1829 This module supports multiple cards.
1831 Module snd-sun-dbri (on sparc only)
1832 -----------------------------------
1834 Module for DBRI sound chips found on Sparcs.
1836 This module supports multiple cards.
1838 Module snd-wavefront
1839 --------------------
1841 Module for Turtle Beach Maui, Tropez and Tropez+ sound cards.
1843 use_cs4232_midi - Use CS4232 MPU-401 interface
1844 (inaccessibly located inside your computer)
1845 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1847 with isapnp=0, the following options are available:
1849 cs4232_pcm_port - Port # for CS4232 PCM interface.
1850 cs4232_pcm_irq - IRQ # for CS4232 PCM interface (5,7,9,11,12,15).
1851 cs4232_mpu_port - Port # for CS4232 MPU-401 interface.
1852 cs4232_mpu_irq - IRQ # for CS4232 MPU-401 interface (9,11,12,15).
1853 ics2115_port - Port # for ICS2115
1854 ics2115_irq - IRQ # for ICS2115
1855 fm_port - FM OPL-3 Port #
1856 dma1 - DMA1 # for CS4232 PCM interface.
1857 dma2 - DMA2 # for CS4232 PCM interface.
1859 The below are options for wavefront_synth features:
1860 wf_raw - Assume that we need to boot the OS (default:no)
1861 If yes, then during driver loading, the state of the board is
1862 ignored, and we reset the board and load the firmware anyway.
1863 fx_raw - Assume that the FX process needs help (default:yes)
1864 If false, we'll leave the FX processor in whatever state it is
1865 when the driver is loaded. The default is to download the
1866 microprogram and associated coefficients to set it up for
1867 "default" operation, whatever that means.
1868 debug_default - Debug parameters for card initialization
1869 wait_usecs - How long to wait without sleeping, usecs
1871 This magic number seems to give pretty optimal throughput
1872 based on my limited experimentation.
1873 If you want to play around with it and find a better value, be
1874 my guest. Remember, the idea is to get a number that causes us
1875 to just busy wait for as many WaveFront commands as possible,
1876 without coming up with a number so large that we hog the whole
1878 Specifically, with this number, out of about 134,000 status
1879 waits, only about 250 result in a sleep.
1880 sleep_interval - How long to sleep when waiting for reply
1882 sleep_tries - How many times to try sleeping during a wait
1884 ospath - Pathname to processed ICS2115 OS firmware
1885 (default:wavefront.os)
1886 The path name of the ISC2115 OS firmware. In the recent
1887 version, it's handled via firmware loader framework, so it
1888 must be installed in the proper path, typically,
1890 reset_time - How long to wait for a reset to take effect
1892 ramcheck_time - How many seconds to wait for the RAM test
1894 osrun_time - How many seconds to wait for the ICS2115 OS
1897 This module supports multiple cards and ISA PnP.
1899 Note: the firmware file "wavefront.os" was located in the earlier
1900 version in /etc. Now it's loaded via firmware loader, and
1901 must be in the proper firmware path, such as /lib/firmware.
1902 Copy (or symlink) the file appropriately if you get an error
1903 regarding firmware downloading after upgrading the kernel.
1905 Module snd-sonicvibes
1906 ---------------------
1908 Module for S3 SonicVibes PCI sound cards.
1909 * PINE Schubert 32 PCI
1911 reverb - Reverb Enable - 1 = enable, 0 = disable (default)
1912 - SoundCard must have onboard SRAM for this.
1913 mge - Mic Gain Enable - 1 = enable, 0 = disable (default)
1915 This module supports multiple cards and autoprobe.
1917 Module snd-serial-u16550
1918 ------------------------
1920 Module for UART16550A serial MIDI ports.
1922 port - port # for UART16550A chip
1923 irq - IRQ # for UART16550A chip, -1 = poll mode
1924 speed - speed in bauds (9600,19200,38400,57600,115200)
1926 base - base for divisor in bauds (57600,115200,230400,460800)
1928 outs - number of MIDI ports in a serial port (1-4)
1930 adaptor - Type of adaptor.
1931 0 = Soundcanvas, 1 = MS-124T, 2 = MS-124W S/A,
1932 3 = MS-124W M/B, 4 = Generic
1934 This module supports multiple cards. This module does not support autoprobe
1935 thus the main port must be specified!!! Other options are optional.
1940 Module for Trident 4DWave DX/NX sound cards.
1941 * Best Union Miss Melody 4DWave PCI
1943 * Warpspeed ONSpeed 4DWave PCI
1946 * CHIC True Sound 4Dwave
1947 * Shark Predator4D-PCI
1948 * Jaton SonicWave 4D
1950 pcm_channels - max channels (voices) reserved for PCM
1951 wavetable_size - max wavetable size in kB (4-?kb)
1953 This module supports multiple cards and autoprobe.
1955 The power-management is supported.
1957 Module snd-usb-audio
1958 --------------------
1960 Module for USB audio and USB MIDI devices.
1962 vid - Vendor ID for the device (optional)
1963 pid - Product ID for the device (optional)
1964 device_setup - Device specific magic number (optional)
1965 - Influence depends on the device
1968 This module supports multiple devices, autoprobe and hotplugging.
1970 Module snd-usb-caiaq
1971 --------------------
1973 Module for caiaq UB audio interfaces,
1974 * Native Instruments RigKontrol2
1975 * Native Instruments Kore Controller
1976 * Native Instruments Audio Kontrol 1
1977 * Native Instruments Audio 8 DJ
1979 This module supports multiple devices, autoprobe and hotplugging.
1981 Module snd-usb-usx2y
1982 --------------------
1984 Module for Tascam USB US-122, US-224 and US-428 devices.
1986 This module supports multiple devices, autoprobe and hotplugging.
1988 Note: you need to load the firmware via usx2yloader utility included
1989 in alsa-tools and alsa-firmware packages.
1994 Module for AC'97 motherboards based on VIA 82C686A/686B, 8233,
1995 8233A, 8233C, 8235, 8237 (south) bridge.
1997 mpu_port - 0x300,0x310,0x320,0x330, otherwise obtain BIOS setup
1999 joystick - Enable joystick (default off) [VIA686A/686B only]
2000 ac97_clock - AC'97 codec clock base (default 48000Hz)
2001 dxs_support - support DXS channels,
2002 0 = auto (default), 1 = enable, 2 = disable,
2003 3 = 48k only, 4 = no VRA, 5 = enable any sample
2004 rate and different sample rates on different
2006 [VIA8233/C, 8235, 8237 only]
2007 ac97_quirk - AC'97 workaround for strange hardware
2008 See "AC97 Quirk Option" section below.
2010 This module supports one chip and autoprobe.
2012 Note: on some SMP motherboards like MSI 694D the interrupts might
2013 not be generated properly. In such a case, please try to
2014 set the SMP (or MPS) version on BIOS to 1.1 instead of
2015 default value 1.4. Then the interrupt number will be
2016 assigned under 15. You might also upgrade your BIOS.
2018 Note: VIA8233/5/7 (not VIA8233A) can support DXS (direct sound)
2019 channels as the first PCM. On these channels, up to 4
2020 streams can be played at the same time, and the controller
2021 can perform sample rate conversion with separate rates for
2023 As default (dxs_support = 0), 48k fixed rate is chosen
2024 except for the known devices since the output is often
2025 noisy except for 48k on some mother boards due to the
2027 Please try once dxs_support=5 and if it works on other
2028 sample rates (e.g. 44.1kHz of mp3 playback), please let us
2029 know the PCI subsystem vendor/device id's (output of
2031 If dxs_support=5 does not work, try dxs_support=4; if it
2032 doesn't work too, try dxs_support=1. (dxs_support=1 is
2033 usually for old motherboards. The correct implemented
2034 board should work with 4 or 5.) If it still doesn't
2035 work and the default setting is ok, dxs_support=3 is the
2036 right choice. If the default setting doesn't work at all,
2037 try dxs_support=2 to disable the DXS channels.
2038 In any cases, please let us know the result and the
2039 subsystem vendor/device ids. See "Links and Addresses"
2042 Note: for the MPU401 on VIA823x, use snd-mpu401 driver
2043 additionally. The mpu_port option is for VIA686 chips only.
2045 The power-management is supported.
2047 Module snd-via82xx-modem
2048 ------------------------
2050 Module for VIA82xx AC97 modem
2052 ac97_clock - AC'97 codec clock base (default 48000Hz)
2054 This module supports one card and autoprobe.
2056 Note: The default index value of this module is -2, i.e. the first
2059 The power-management is supported.
2064 Module for virtual rawmidi devices.
2065 This module creates virtual rawmidi devices which communicate
2066 to the corresponding ALSA sequencer ports.
2068 midi_devs - MIDI devices # (1-4, default=4)
2070 This module supports multiple cards.
2075 Module for sound cards based on the Asus AV200 chip, i.e.,
2076 Xonar D2 and Xonar D2X.
2078 This module supports autoprobe and multiple cards.
2080 Power management is _not_ supported.
2085 Module for Digigram VX-Pocket VX222, V222 v2 and Mic cards.
2087 mic - Enable Microphone on V222 Mic (NYI)
2088 ibl - Capture IBL size. (default = 0, minimum size)
2090 This module supports multiple cards.
2092 When the driver is compiled as a module and the hotplug firmware
2093 is supported, the firmware data is loaded via hotplug automatically.
2094 Install the necessary firmware files in alsa-firmware package.
2095 When no hotplug fw loader is available, you need to load the
2096 firmware via vxloader utility in alsa-tools package. To invoke
2097 vxloader automatically, add the following to /etc/modprobe.conf
2099 install snd-vx222 /sbin/modprobe --first-time -i snd-vx222 && /usr/bin/vxloader
2101 (for 2.2/2.4 kernels, add "post-install /usr/bin/vxloader" to
2102 /etc/modules.conf, instead.)
2103 IBL size defines the interrupts period for PCM. The smaller size
2104 gives smaller latency but leads to more CPU consumption, too.
2105 The size is usually aligned to 126. As default (=0), the smallest
2106 size is chosen. The possible IBL values can be found in
2107 /proc/asound/cardX/vx-status proc file.
2109 The power-management is supported.
2114 Module for Digigram VX-Pocket VX2 and 440 PCMCIA cards.
2116 ibl - Capture IBL size. (default = 0, minimum size)
2118 This module supports multiple cards. The module is compiled only when
2119 PCMCIA is supported on kernel.
2121 With the older 2.6.x kernel, to activate the driver via the card
2122 manager, you'll need to set up /etc/pcmcia/vxpocket.conf. See the
2123 sound/pcmcia/vx/vxpocket.c. 2.6.13 or later kernel requires no
2124 longer require a config file.
2126 When the driver is compiled as a module and the hotplug firmware
2127 is supported, the firmware data is loaded via hotplug automatically.
2128 Install the necessary firmware files in alsa-firmware package.
2129 When no hotplug fw loader is available, you need to load the
2130 firmware via vxloader utility in alsa-tools package.
2132 About capture IBL, see the description of snd-vx222 module.
2134 Note: snd-vxp440 driver is merged to snd-vxpocket driver since
2137 The power-management is supported.
2142 Module for Yamaha PCI chips (YMF72x, YMF74x & YMF75x).
2144 mpu_port - 0x300,0x330,0x332,0x334, 0 (disable) by default,
2145 1 (auto-detect for YMF744/754 only)
2146 fm_port - 0x388,0x398,0x3a0,0x3a8, 0 (disable) by default
2147 1 (auto-detect for YMF744/754 only)
2148 joystick_port - 0x201,0x202,0x204,0x205, 0 (disable) by default,
2150 rear_switch - enable shared rear/line-in switch (bool)
2152 This module supports autoprobe and multiple chips.
2154 The power-management is supported.
2156 Module snd-pdaudiocf
2157 --------------------
2159 Module for Sound Core PDAudioCF sound card.
2161 The power-management is supported.
2167 The ac97_quirk option is used to enable/override the workaround for
2168 specific devices on drivers for on-board AC'97 controllers like
2169 snd-intel8x0. Some hardware have swapped output pins between Master
2170 and Headphone, or Surround (thanks to confusion of AC'97
2171 specifications from version to version :-)
2173 The driver provides the auto-detection of known problematic devices,
2174 but some might be unknown or wrongly detected. In such a case, pass
2175 the proper value with this option.
2177 The following strings are accepted:
2178 - default Don't override the default setting
2179 - none Disable the quirk
2180 - hp_only Bind Master and Headphone controls as a single control
2181 - swap_hp Swap headphone and master controls
2182 - swap_surround Swap master and surround controls
2183 - ad_sharing For AD1985, turn on OMS bit and use headphone
2184 - alc_jack For ALC65x, turn on the jack sense mode
2185 - inv_eapd Inverted EAPD implementation
2186 - mute_led Bind EAPD bit for turning on/off mute LED
2188 For backward compatibility, the corresponding integer value -1, 0,
2189 ... are accepted, too.
2191 For example, if "Master" volume control has no effect on your device
2192 but only "Headphone" does, pass ac97_quirk=hp_only module option.
2195 Configuring Non-ISAPNP Cards
2196 ============================
2198 When the kernel is configured with ISA-PnP support, the modules
2199 supporting the isapnp cards will have module options "isapnp".
2200 If this option is set, *only* the ISA-PnP devices will be probed.
2201 For probing the non ISA-PnP cards, you have to pass "isapnp=0" option
2202 together with the proper i/o and irq configuration.
2204 When the kernel is configured without ISA-PnP support, isapnp option
2205 will be not built in.
2208 Module Autoloading Support
2209 ==========================
2211 The ALSA drivers can be loaded automatically on demand by defining
2212 module aliases. The string 'snd-card-%1' is requested for ALSA native
2213 devices where %i is sound card number from zero to seven.
2215 To auto-load an ALSA driver for OSS services, define the string
2216 'sound-slot-%i' where %i means the slot number for OSS, which
2217 corresponds to the card index of ALSA. Usually, define this
2218 as the same card module.
2220 An example configuration for a single emu10k1 card is like below:
2221 ----- /etc/modprobe.conf
2222 alias snd-card-0 snd-emu10k1
2223 alias sound-slot-0 snd-emu10k1
2224 ----- /etc/modprobe.conf
2226 The available number of auto-loaded sound cards depends on the module
2227 option "cards_limit" of snd module. As default it's set to 1.
2228 To enable the auto-loading of multiple cards, specify the number of
2229 sound cards in that option.
2231 When multiple cards are available, it'd better to specify the index
2232 number for each card via module option, too, so that the order of
2233 cards is kept consistent.
2235 An example configuration for two sound cards is like below:
2237 ----- /etc/modprobe.conf
2239 options snd cards_limit=2
2240 alias snd-card-0 snd-interwave
2241 alias snd-card-1 snd-ens1371
2242 options snd-interwave index=0
2243 options snd-ens1371 index=1
2245 alias sound-slot-0 snd-interwave
2246 alias sound-slot-1 snd-ens1371
2247 ----- /etc/modprobe.conf
2249 In this example, the interwave card is always loaded as the first card
2250 (index 0) and ens1371 as the second (index 1).
2252 Alternative (and new) way to fixate the slot assignment is to use
2253 "slots" option of snd module. In the case above, specify like the
2256 options snd slots=snd-interwave,snd-ens1371
2258 Then, the first slot (#0) is reserved for snd-interwave driver, and
2259 the second (#1) for snd-ens1371. You can omit index option in each
2260 driver if slots option is used (although you can still have them at
2261 the same time as long as they don't conflict).
2263 The slots option is especially useful for avoiding the possible
2264 hot-plugging and the resultant slot conflict. For example, in the
2265 case above again, the first two slots are already reserved. If any
2266 other driver (e.g. snd-usb-audio) is loaded before snd-interwave or
2267 snd-ens1371, it will be assigned to the third or later slot.
2270 ALSA PCM devices to OSS devices mapping
2271 =======================================
2273 /dev/snd/pcmC0D0[c|p] -> /dev/audio0 (/dev/audio) -> minor 4
2274 /dev/snd/pcmC0D0[c|p] -> /dev/dsp0 (/dev/dsp) -> minor 3
2275 /dev/snd/pcmC0D1[c|p] -> /dev/adsp0 (/dev/adsp) -> minor 12
2276 /dev/snd/pcmC1D0[c|p] -> /dev/audio1 -> minor 4+16 = 20
2277 /dev/snd/pcmC1D0[c|p] -> /dev/dsp1 -> minor 3+16 = 19
2278 /dev/snd/pcmC1D1[c|p] -> /dev/adsp1 -> minor 12+16 = 28
2279 /dev/snd/pcmC2D0[c|p] -> /dev/audio2 -> minor 4+32 = 36
2280 /dev/snd/pcmC2D0[c|p] -> /dev/dsp2 -> minor 3+32 = 39
2281 /dev/snd/pcmC2D1[c|p] -> /dev/adsp2 -> minor 12+32 = 44
2283 The first number from /dev/snd/pcmC{X}D{Y}[c|p] expression means
2284 sound card number and second means device number. The ALSA devices
2285 have either 'c' or 'p' suffix indicating the direction, capture and
2286 playback, respectively.
2288 Please note that the device mapping above may be varied via the module
2289 options of snd-pcm-oss module.
2292 Proc interfaces (/proc/asound)
2293 ==============================
2295 /proc/asound/card#/pcm#[cp]/oss
2296 -------------------------------
2297 String "erase" - erase all additional informations about OSS applications
2298 String "<app_name> <fragments> <fragment_size> [<options>]"
2300 <app_name> - name of application with (higher priority) or without path
2301 <fragments> - number of fragments or zero if auto
2302 <fragment_size> - size of fragment in bytes or zero if auto
2303 <options> - optional parameters
2304 - disable the application tries to open a pcm device for
2305 this channel but does not want to use it.
2306 (Cause a bug or mmap needs)
2307 It's good for Quake etc...
2308 - direct don't use plugins
2309 - block force block mode (rvplayer)
2310 - non-block force non-block mode
2311 - whole-frag write only whole fragments (optimization affecting
2313 - no-silence do not fill silence ahead to avoid clicks
2314 - buggy-ptr Returns the whitespace blocks in GETOPTR ioctl
2315 instead of filled blocks
2317 Example: echo "x11amp 128 16384" > /proc/asound/card0/pcm0p/oss
2318 echo "squake 0 0 disable" > /proc/asound/card0/pcm0c/oss
2319 echo "rvplayer 0 0 block" > /proc/asound/card0/pcm0p/oss
2322 Early Buffer Allocation
2323 =======================
2325 Some drivers (e.g. hdsp) require the large contiguous buffers, and
2326 sometimes it's too late to find such spaces when the driver module is
2327 actually loaded due to memory fragmentation. You can pre-allocate the
2328 PCM buffers by loading snd-page-alloc module and write commands to its
2329 proc file in prior, for example, in the early boot stage like
2330 /etc/init.d/*.local scripts.
2332 Reading the proc file /proc/drivers/snd-page-alloc shows the current
2333 usage of page allocation. In writing, you can send the following
2334 commands to the snd-page-alloc driver:
2336 - add VENDOR DEVICE MASK SIZE BUFFERS
2338 VENDOR and DEVICE are PCI vendor and device IDs. They take
2339 integer numbers (0x prefix is needed for the hex).
2340 MASK is the PCI DMA mask. Pass 0 if not restricted.
2341 SIZE is the size of each buffer to allocate. You can pass
2342 k and m suffix for KB and MB. The max number is 16MB.
2343 BUFFERS is the number of buffers to allocate. It must be greater
2344 than 0. The max number is 4.
2348 This will erase the all pre-allocated buffers which are not in
2355 ALSA project homepage
2356 http://www.alsa-project.org
2358 ALSA Bug Tracking System
2359 https://bugtrack.alsa-project.org/bugs/
2362 mailto:alsa-devel@alsa-project.org
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