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 basic fixed pin assignment w/o SPDIF
829 auto auto-config reading BIOS (default)
835 dell Dell OEM laptops (Vostro 1200)
837 test for testing/debugging purpose, almost all controls can
838 adjusted. Appearing only when compiled with
840 auto auto-config reading BIOS (default)
843 3stack-dig 3-stack (2-channel) with SPDIF
844 3stack-6ch 3-stack (6-channel)
845 3stack-6ch-dig 3-stack (6-channel) with SPDIF
846 6stack-dig 6-stack with SPDIF
847 lenovo-101e Lenovo laptop
848 eeepc-p701 ASUS Eeepc P701
849 eeepc-ep20 ASUS Eeepc EP20
850 auto auto-config reading BIOS (default)
853 3stack-dig 3-jack with SPDIF I/O
854 6stack-dig 6-jack digital with SPDIF I/O
856 targa Targa T8, MSI-1049 T8
859 macpro MacPro support
860 mbp3 Macbook Pro rev3
861 imac24 iMac 24'' with jack detection
863 auto auto-config reading BIOS (default)
866 3stack-dig 3-jack with SPDIF I/O
867 6stack-dig 6-jack digital with SPDIF I/O
868 3stack-6ch 3-jack 6-channel
869 3stack-6ch-dig 3-jack 6-channel with SPDIF I/O
870 6stack-dig-demo 6-jack digital for Intel demo board
871 acer Acer laptops (Travelmate 3012WTMi, Aspire 5600, etc)
872 acer-aspire Acer Aspire 9810
873 medion Medion Laptops
874 medion-md2 Medion MD2
876 targa-2ch-dig Targs/MSI with 2-channel
877 laptop-eapd 3-jack with SPDIF I/O and EAPD (Clevo M540JE, M550JE)
878 lenovo-101e Lenovo 101E
879 lenovo-nb0763 Lenovo NB0763
880 lenovo-ms7195-dig Lenovo MS7195
882 6stack-hp HP machines with 6stack (Nettle boards)
883 3stack-hp HP machines with 3stack (Lucknow, Samba boards)
884 6stack-dell Dell machines with 6stack (Inspiron 530)
886 auto auto-config reading BIOS (default)
890 3stack-dig 3-jack with SPDIF I/O
891 6stack-dig 6-jack with SPDIF I/O
892 3stack-660 3-jack (for ALC660)
893 uniwill-m31 Uniwill M31 laptop
894 toshiba Toshiba laptop support
895 asus Asus laptop support
896 asus-laptop ASUS F2/F3 laptops
897 auto auto-config reading BIOS (default)
901 3stack-dig 3-jack with SPDIF OUT
902 6stack-dig 6-jack with SPDIF OUT
903 3stack-660 3-jack (for ALC660VD)
904 3stack-660-digout 3-jack with SPDIF OUT (for ALC660VD)
905 lenovo Lenovo 3000 C200
906 dallas Dallas laptops
908 auto auto-config reading BIOS (default)
911 minimal 3-jack in back
912 min_fp 3-jack in back, 2-jack in front
913 full 6-jack in back, 2-jack in front
914 full_dig 6-jack in back, 2-jack in front, SPDIF I/O
915 allout 5-jack in back, 2-jack in front, SPDIF out
916 auto auto-config reading BIOS (default)
919 3stack 3-stack mode (default)
922 AD1884A / AD1883 / AD1984A / AD1984B
923 desktop 3-stack desktop (default)
924 laptop laptop with HP jack sensing
925 mobile mobile devices with HP jack sensing
931 basic 3-jack (default)
933 thinkpad Lenovo Thinkpad T60/X60/Z60
940 basic default configuration
941 thinkpad Lenovo Thinkpad T61/X61
945 6stack 6-jack, separate surrounds (default)
946 3stack 3-stack, shared surrounds
947 laptop 2-channel only (FSC V2060, Samsung M50)
948 laptop-eapd 2-channel with EAPD (Samsung R65, ASUS A6J)
949 laptop-automute 2-channel with EAPD and HP-automute (Lenovo N100)
950 ultra 2-channel with EAPD (Samsung Ultra tablet PC)
954 6stack-dig ditto with SPDIF
956 3stack-dig ditto with SPDIF
957 laptop 3-jack with hp-jack automute
958 laptop-dig ditto with SPDIF
959 auto auto-config reading BIOS (default)
962 laptop-hpsense Laptop with HP sense (old model laptop)
963 laptop-micsense Laptop with Mic sense (old model fujitsu)
964 laptop-hpmicsense Laptop with HP and Mic senses
966 test for testing/debugging purpose, almost all controls
967 can be adjusted. Appearing only when compiled with
971 laptop Basic Laptop config
972 laptop-hp Laptop config for some HP models (subdevice 30A5)
973 laptop-eapd Laptop config with EAPD support
974 test for testing/debugging purpose, almost all controls
975 can be adjusted. Appearing only when compiled with
979 laptop Basic Laptop config (default)
984 dell-d21 Dell (unknown)
985 dell-d22 Dell (unknown)
986 dell-d23 Dell (unknown)
987 dell-m21 Dell Inspiron 630m, Dell Inspiron 640m
988 dell-m22 Dell Latitude D620, Dell Latitude D820
989 dell-m23 Dell XPS M1710, Dell Precision M90
990 dell-m24 Dell Latitude 120L
991 dell-m25 Dell Inspiron E1505n
992 dell-m26 Dell Inspiron 1501
993 dell-m27 Dell Inspiron E1705/9400
994 gateway Gateway laptops with EAPD control
995 panasonic Panasonic CF-74
999 dell-m42 Dell (unknown)
1000 dell-m43 Dell Precision
1001 dell-m44 Dell Inspiron
1006 5stack D945 5stack + SPDIF
1007 intel-mac-v1 Intel Mac Type 1
1008 intel-mac-v2 Intel Mac Type 2
1009 intel-mac-v3 Intel Mac Type 3
1010 intel-mac-v4 Intel Mac Type 4
1011 intel-mac-v5 Intel Mac Type 5
1012 macmini Intel Mac Mini (equivalent with type 3)
1013 macbook Intel Mac Book (eq. type 5)
1014 macbook-pro-v1 Intel Mac Book Pro 1st generation (eq. type 3)
1015 macbook-pro Intel Mac Book Pro 2nd generation (eq. type 3)
1016 imac-intel Intel iMac (eq. type 2)
1017 imac-intel-20 Intel iMac (newer version) (eq. type 3)
1018 dell-d81 Dell (unknown)
1019 dell-d82 Dell (unknown)
1020 dell-m81 Dell (unknown)
1021 dell-m82 Dell XPS M1210
1024 ref Reference board, base config
1025 m2-2 Some Gateway MX series laptops
1026 m6 Some Gateway NX series laptops
1027 pa6 Gateway NX860 series
1029 STAC9227/9228/9229/927x
1032 5stack D965 5stack + SPDIF
1033 dell-3stack Dell Dimension E520
1034 dell-bios Fixes with Dell BIOS setup
1038 dell-m4-1 Dell desktops
1039 dell-m4-2 Dell desktops
1043 dell-m6 Dell desktops
1046 vaio Setup for VAIO FE550G/SZ110
1047 vaio-ar Setup for VAIO AR
1049 The model name "genric" is treated as a special case. When this
1050 model is given, the driver uses the generic codec parser without
1051 "codec-patch". It's sometimes good for testing and debugging.
1053 If the default configuration doesn't work and one of the above
1054 matches with your device, report it together with the PCI
1055 subsystem ID (output of "lspci -nv") to ALSA BTS or alsa-devel
1056 ML (see the section "Links and Addresses").
1058 power_save and power_save_controller options are for power-saving
1059 mode. See powersave.txt for details.
1061 Note 2: If you get click noises on output, try the module option
1062 position_fix=1 or 2. position_fix=1 will use the SD_LPIB
1063 register value without FIFO size correction as the current
1064 DMA pointer. position_fix=2 will make the driver to use
1065 the position buffer instead of reading SD_LPIB register.
1066 (Usually SD_LPLIB register is more accurate than the
1069 NB: If you get many "azx_get_response timeout" messages at
1070 loading, it's likely a problem of interrupts (e.g. ACPI irq
1071 routing). Try to boot with options like "pci=noacpi". Also, you
1072 can try "single_cmd=1" module option. This will switch the
1073 communication method between HDA controller and codecs to the
1074 single immediate commands instead of CORB/RIRB. Basically, the
1075 single command mode is provided only for BIOS, and you won't get
1076 unsolicited events, too. But, at least, this works independently
1077 from the irq. Remember this is a last resort, and should be
1078 avoided as much as possible...
1080 MORE NOTES ON "azx_get_response timeout" PROBLEMS:
1081 On some hardwares, you may need to add a proper probe_mask option
1082 to avoid the "azx_get_response timeout" problem above, instead.
1083 This occurs when the access to non-existing or non-working codec slot
1084 (likely a modem one) causes a stall of the communication via HD-audio
1085 bus. You can see which codec slots are probed by enabling
1086 CONFIG_SND_DEBUG_DETECT, or simply from the file name of the codec
1087 proc files. Then limit the slots to probe by probe_mask option.
1088 For example, probe_mask=1 means to probe only the first slot, and
1089 probe_mask=4 means only the third slot.
1091 The power-management is supported.
1096 Module for RME Hammerfall DSP audio interface(s)
1098 This module supports multiple cards.
1100 Note: The firmware data can be automatically loaded via hotplug
1101 when CONFIG_FW_LOADER is set. Otherwise, you need to load
1102 the firmware via hdsploader utility included in alsa-tools
1104 The firmware data is found in alsa-firmware package.
1106 Note: snd-page-alloc module does the job which snd-hammerfall-mem
1107 module did formerly. It will allocate the buffers in advance
1108 when any HDSP cards are found. To make the buffer
1109 allocation sure, load snd-page-alloc module in the early
1110 stage of boot sequence. See "Early Buffer Allocation"
1116 Module for RME HDSP MADI board.
1118 precise_ptr - Enable precise pointer, or disable.
1119 line_outs_monitor - Send playback streams to analog outs by default.
1120 enable_monitor - Enable Analog Out on Channel 63/64 by default.
1122 See hdspm.txt for details.
1127 Module for the MediaTek/TempoTec HiFier Fantasia sound card.
1129 This module supports autoprobe and multiple cards.
1131 Power management is _not_ supported.
1136 Module for Envy24 (ICE1712) based PCI sound cards.
1137 * MidiMan M Audio Delta 1010
1138 * MidiMan M Audio Delta 1010LT
1139 * MidiMan M Audio Delta DiO 2496
1140 * MidiMan M Audio Delta 66
1141 * MidiMan M Audio Delta 44
1142 * MidiMan M Audio Delta 410
1143 * MidiMan M Audio Audiophile 2496
1146 * TerraTec EWX 24/96
1147 * TerraTec DMX 6Fire
1149 * Hoontech SoundTrack DSP 24
1150 * Hoontech SoundTrack DSP 24 Value
1151 * Hoontech SoundTrack DSP 24 Media 7.1
1152 * Event Electronics, EZ8
1154 * Lionstracs, Mediastaton
1156 model - Use the given board model, one of the following:
1157 delta1010, dio2496, delta66, delta44, audiophile, delta410,
1158 delta1010lt, vx442, ewx2496, ews88mt, ews88mt_new, ews88d,
1159 dmx6fire, dsp24, dsp24_value, dsp24_71, ez8,
1160 phase88, mediastation
1161 omni - Omni I/O support for MidiMan M-Audio Delta44/66
1162 cs8427_timeout - reset timeout for the CS8427 chip (S/PDIF transceiver)
1163 in msec resolution, default value is 500 (0.5 sec)
1165 This module supports multiple cards and autoprobe. Note: The consumer part
1166 is not used with all Envy24 based cards (for example in the MidiMan Delta
1169 Note: The supported board is detected by reading EEPROM or PCI
1170 SSID (if EEPROM isn't available). You can override the
1171 model by passing "model" module option in case that the
1172 driver isn't configured properly or you want to try another
1178 Module for Envy24HT (VT/ICE1724), Envy24PT (VT1720) based PCI sound cards.
1179 * MidiMan M Audio Revolution 5.1
1180 * MidiMan M Audio Revolution 7.1
1181 * MidiMan M Audio Audiophile 192
1183 * TerraTec Aureon 5.1 Sky
1184 * TerraTec Aureon 7.1 Space
1185 * TerraTec Aureon 7.1 Universe
1188 * AudioTrak Prodigy 7.1
1189 * AudioTrak Prodigy 7.1LT
1190 * AudioTrak Prodigy 192
1192 * Albatron K8X800 Pro II
1193 * Chaintech ZNF3-150
1194 * Chaintech ZNF3-250
1201 model - Use the given board model, one of the following:
1202 revo51, revo71, amp2000, prodigy71, prodigy71lt,
1203 prodigy192, aureon51, aureon71, universe, ap192,
1204 k8x800, phase22, phase28, ms300, av710, se200pci,
1207 This module supports multiple cards and autoprobe.
1209 Note: The supported board is detected by reading EEPROM or PCI
1210 SSID (if EEPROM isn't available). You can override the
1211 model by passing "model" module option in case that the
1212 driver isn't configured properly or you want to try another
1218 Module for Echoaudio Indigo
1220 This module supports multiple cards.
1221 The driver requires the firmware loader support on kernel.
1226 Module for Echoaudio Indigo DJ
1228 This module supports multiple cards.
1229 The driver requires the firmware loader support on kernel.
1234 Module for Echoaudio Indigo IO
1236 This module supports multiple cards.
1237 The driver requires the firmware loader support on kernel.
1242 Module for AC'97 motherboards from Intel and compatibles.
1243 * Intel i810/810E, i815, i820, i830, i84x, MX440
1244 ICH5, ICH6, ICH7, ESB2
1245 * SiS 7012 (SiS 735)
1246 * NVidia NForce, NForce2, NForce3, MCP04, CK804
1248 * AMD AMD768, AMD8111
1251 ac97_clock - AC'97 codec clock base (0 = auto-detect)
1252 ac97_quirk - AC'97 workaround for strange hardware
1253 See "AC97 Quirk Option" section below.
1254 buggy_irq - Enable workaround for buggy interrupts on some
1255 motherboards (default yes on nForce chips,
1257 buggy_semaphore - Enable workaround for hardwares with buggy
1258 semaphores (e.g. on some ASUS laptops)
1260 spdif_aclink - Use S/PDIF over AC-link instead of direct connection
1261 from the controller chip
1262 (0 = off, 1 = on, -1 = default)
1264 This module supports one chip and autoprobe.
1266 Note: the latest driver supports auto-detection of chip clock.
1267 if you still encounter too fast playback, specify the clock
1268 explicitly via the module option "ac97_clock=41194".
1270 Joystick/MIDI ports are not supported by this driver. If your
1271 motherboard has these devices, use the ns558 or snd-mpu401
1272 modules, respectively.
1274 The power-management is supported.
1276 Module snd-intel8x0m
1277 --------------------
1279 Module for Intel ICH (i8x0) chipset MC97 modems.
1280 * Intel i810/810E, i815, i820, i830, i84x, MX440
1282 * SiS 7013 (SiS 735)
1283 * NVidia NForce, NForce2, NForce2s, NForce3
1287 ac97_clock - AC'97 codec clock base (0 = auto-detect)
1289 This module supports one card and autoprobe.
1291 Note: The default index value of this module is -2, i.e. the first
1294 The power-management is supported.
1296 Module snd-interwave
1297 --------------------
1299 Module for Gravis UltraSound PnP, Dynasonic 3-D/Pro, STB Sound Rage 32
1300 and other sound cards based on AMD InterWave (tm) chip.
1302 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
1303 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
1304 pcm_voices - reserved PCM voices for the synthesizer (default 2)
1305 effect - 1 = InterWave effects enable (default 0);
1307 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1309 with isapnp=0, the following options are available:
1311 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
1312 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
1313 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
1314 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
1316 This module supports multiple cards, autoprobe and ISA PnP.
1318 Module snd-interwave-stb
1319 ------------------------
1321 Module for UltraSound 32-Pro (sound card from STB used by Compaq)
1322 and other sound cards based on AMD InterWave (tm) chip with TEA6330T
1323 circuit for extended control of bass, treble and master volume.
1325 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
1326 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
1327 pcm_voices - reserved PCM voices for the synthesizer (default 2)
1328 effect - 1 = InterWave effects enable (default 0);
1330 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1332 with isapnp=0, the following options are available:
1334 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
1335 port_tc - tone control (i2c bus) port # for TEA6330T chip (0x350,0x360,0x370,0x380)
1336 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
1337 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
1338 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
1340 This module supports multiple cards, autoprobe and ISA PnP.
1345 Module for Korg 1212 IO PCI card
1347 This module supports multiple cards.
1352 Module for Echoaudio Layla20
1354 This module supports multiple cards.
1355 The driver requires the firmware loader support on kernel.
1360 Module for Echoaudio Layla24
1362 This module supports multiple cards.
1363 The driver requires the firmware loader support on kernel.
1368 Module for Allegro/Maestro3 chips
1370 external_amp - enable external amp (enabled by default)
1371 amp_gpio - GPIO pin number for external amp (0-15) or
1372 -1 for default pin (8 for allegro, 1 for
1375 This module supports autoprobe and multiple chips.
1377 Note: the binding of amplifier is dependent on hardware.
1378 If there is no sound even though all channels are unmuted, try to
1379 specify other gpio connection via amp_gpio option.
1380 For example, a Panasonic notebook might need "amp_gpio=0x0d"
1383 The power-management is supported.
1388 Module for Echoaudio Mia
1390 This module supports multiple cards.
1391 The driver requires the firmware loader support on kernel.
1396 Module for Miro soundcards: miroSOUND PCM 1 pro,
1398 miroSOUND PCM 20 Radio.
1400 port - Port # (0x530,0x604,0xe80,0xf40)
1401 irq - IRQ # (5,7,9,10,11)
1402 dma1 - 1st dma # (0,1,3)
1403 dma2 - 2nd dma # (0,1)
1404 mpu_port - MPU-401 port # (0x300,0x310,0x320,0x330)
1405 mpu_irq - MPU-401 irq # (5,7,9,10)
1406 fm_port - FM Port # (0x388)
1407 wss - enable WSS mode
1408 ide - enable onboard ide support
1413 Module for Digigram miXart8 sound cards.
1415 This module supports multiple cards.
1416 Note: One miXart8 board will be represented as 4 alsa cards.
1417 See MIXART.txt for details.
1419 When the driver is compiled as a module and the hotplug firmware
1420 is supported, the firmware data is loaded via hotplug automatically.
1421 Install the necessary firmware files in alsa-firmware package.
1422 When no hotplug fw loader is available, you need to load the
1423 firmware via mixartloader utility in alsa-tools package.
1428 Module for Echoaudio Mona
1430 This module supports multiple cards.
1431 The driver requires the firmware loader support on kernel.
1436 Module for MPU-401 UART devices.
1438 port - port number or -1 (disable)
1439 irq - IRQ number or -1 (disable)
1440 pnp - PnP detection - 0 = disable, 1 = enable (default)
1442 This module supports multiple devices and PnP.
1447 Module for MOTU MidiTimePiece AV multiport MIDI (on the parallel
1450 port - I/O port # for MTPAV (0x378,0x278, default=0x378)
1451 irq - IRQ # for MTPAV (7,5, default=7)
1452 hwports - number of supported hardware ports, default=8.
1454 Module supports only 1 card. This module has no enable option.
1459 Module for Ego Systems (ESI) Miditerminal 4140
1461 This module supports multiple devices.
1462 Requires parport (CONFIG_PARPORT).
1467 Module for NeoMagic NM256AV/ZX chips
1469 playback_bufsize - max playback frame size in kB (4-128kB)
1470 capture_bufsize - max capture frame size in kB (4-128kB)
1471 force_ac97 - 0 or 1 (disabled by default)
1472 buffer_top - specify buffer top address
1473 use_cache - 0 or 1 (disabled by default)
1474 vaio_hack - alias buffer_top=0x25a800
1475 reset_workaround - enable AC97 RESET workaround for some laptops
1476 reset_workaround2 - enable extended AC97 RESET workaround for some
1479 This module supports one chip and autoprobe.
1481 The power-management is supported.
1483 Note: on some notebooks the buffer address cannot be detected
1484 automatically, or causes hang-up during initialization.
1485 In such a case, specify the buffer top address explicitly via
1486 the buffer_top option.
1488 Sony F250: buffer_top=0x25a800
1489 Sony F270: buffer_top=0x272800
1490 The driver supports only ac97 codec. It's possible to force
1491 to initialize/use ac97 although it's not detected. In such a
1492 case, use force_ac97=1 option - but *NO* guarantee whether it
1495 Note: The NM256 chip can be linked internally with non-AC97
1496 codecs. This driver supports only the AC97 codec, and won't work
1497 with machines with other (most likely CS423x or OPL3SAx) chips,
1498 even though the device is detected in lspci. In such a case, try
1499 other drivers, e.g. snd-cs4232 or snd-opl3sa2. Some has ISA-PnP
1500 but some doesn't have ISA PnP. You'll need to specify isapnp=0
1501 and proper hardware parameters in the case without ISA PnP.
1503 Note: some laptops need a workaround for AC97 RESET. For the
1504 known hardware like Dell Latitude LS and Sony PCG-F305, this
1505 workaround is enabled automatically. For other laptops with a
1506 hard freeze, you can try reset_workaround=1 option.
1508 Note: Dell Latitude CSx laptops have another problem regarding
1509 AC97 RESET. On these laptops, reset_workaround2 option is
1510 turned on as default. This option is worth to try if the
1511 previous reset_workaround option doesn't help.
1513 Note: This driver is really crappy. It's a porting from the
1514 OSS driver, which is a result of black-magic reverse engineering.
1515 The detection of codec will fail if the driver is loaded *after*
1516 X-server as described above. You might be able to force to load
1517 the module, but it may result in hang-up. Hence, make sure that
1518 you load this module *before* X if you encounter this kind of
1524 Module for Yamaha OPL3-SA2/SA3 sound cards.
1526 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1528 with isapnp=0, the following options are available:
1530 port - control port # for OPL3-SA chip (0x370)
1531 sb_port - SB port # for OPL3-SA chip (0x220,0x240)
1532 wss_port - WSS port # for OPL3-SA chip (0x530,0xe80,0xf40,0x604)
1533 midi_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1534 fm_port - FM port # for OPL3-SA chip (0x388), -1 = disable
1535 irq - IRQ # for OPL3-SA chip (5,7,9,10)
1536 dma1 - first DMA # for Yamaha OPL3-SA chip (0,1,3)
1537 dma2 - second DMA # for Yamaha OPL3-SA chip (0,1,3), -1 = disable
1539 This module supports multiple cards and ISA PnP. It does not support
1540 autoprobe (if ISA PnP is not used) thus all ports must be specified!!!
1542 The power-management is supported.
1544 Module snd-opti92x-ad1848
1545 -------------------------
1547 Module for sound cards based on OPTi 82c92x and Analog Devices AD1848 chips.
1548 Module works with OAK Mozart cards as well.
1550 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1552 with isapnp=0, the following options are available:
1554 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1555 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1556 fm_port - port # for OPL3 device (0x388)
1557 irq - IRQ # for WSS chip (5,7,9,10,11)
1558 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1559 dma1 - first DMA # for WSS chip (0,1,3)
1561 This module supports only one card, autoprobe and PnP.
1563 Module snd-opti92x-cs4231
1564 -------------------------
1566 Module for sound cards based on OPTi 82c92x and Crystal CS4231 chips.
1568 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1570 with isapnp=0, the following options are available:
1572 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1573 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1574 fm_port - port # for OPL3 device (0x388)
1575 irq - IRQ # for WSS chip (5,7,9,10,11)
1576 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1577 dma1 - first DMA # for WSS chip (0,1,3)
1578 dma2 - second DMA # for WSS chip (0,1,3)
1580 This module supports only one card, autoprobe and PnP.
1585 Module for sound cards based on OPTi 82c93x chips.
1587 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1589 with isapnp=0, the following options are available:
1591 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1592 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1593 fm_port - port # for OPL3 device (0x388)
1594 irq - IRQ # for WSS chip (5,7,9,10,11)
1595 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1596 dma1 - first DMA # for WSS chip (0,1,3)
1597 dma2 - second DMA # for WSS chip (0,1,3)
1599 This module supports only one card, autoprobe and PnP.
1604 Module for sound cards based on the C-Media CMI8788 chip:
1606 * AuzenTech X-Meridian
1608 * Club3D Theatron DTS
1610 * Razer Barracuda AC-1
1613 This module supports autoprobe and multiple cards.
1615 Power management is _not_ supported.
1620 Module for internal PC-Speaker.
1622 nforce_wa - enable NForce chipset workaround. Expect bad sound.
1624 This module supports system beeps, some kind of PCM playback and
1625 even a few mixer controls.
1630 Module for Digigram PCXHR boards
1632 This module supports multiple cards.
1634 Module snd-portman2x4
1635 ---------------------
1637 Module for Midiman Portman 2x4 parallel port MIDI interface
1639 This module supports multiple cards.
1641 Module snd-powermac (on ppc only)
1642 ---------------------------------
1644 Module for PowerMac, iMac and iBook on-board soundchips
1646 enable_beep - enable beep using PCM (enabled as default)
1648 Module supports autoprobe a chip.
1650 Note: the driver may have problems regarding endianess.
1652 The power-management is supported.
1654 Module snd-pxa2xx-ac97 (on arm only)
1655 ------------------------------------
1657 Module for AC97 driver for the Intel PXA2xx chip
1659 For ARM architecture only.
1661 The power-management is supported.
1666 Module for Conexant Riptide chip
1668 joystick_port - Joystick port # (default: 0x200)
1669 mpu_port - MPU401 port # (default: 0x330)
1670 opl3_port - OPL3 port # (default: 0x388)
1672 This module supports multiple cards.
1673 The driver requires the firmware loader support on kernel.
1674 You need to install the firmware file "riptide.hex" to the standard
1675 firmware path (e.g. /lib/firmware).
1680 Module for RME Digi32, Digi32 Pro and Digi32/8 (Sek'd Prodif32,
1681 Prodif96 and Prodif Gold) sound cards.
1683 This module supports multiple cards.
1688 Module for RME Digi96, Digi96/8 and Digi96/8 PRO/PAD/PST sound cards.
1690 This module supports multiple cards.
1695 Module for RME Digi9652 (Hammerfall, Hammerfall-Light) sound cards.
1697 precise_ptr - Enable precise pointer (doesn't work reliably).
1700 This module supports multiple cards.
1702 Note: snd-page-alloc module does the job which snd-hammerfall-mem
1703 module did formerly. It will allocate the buffers in advance
1704 when any RME9652 cards are found. To make the buffer
1705 allocation sure, load snd-page-alloc module in the early
1706 stage of boot sequence. See "Early Buffer Allocation"
1709 Module snd-sa11xx-uda1341 (on arm only)
1710 ---------------------------------------
1712 Module for Philips UDA1341TS on Compaq iPAQ H3600 sound card.
1714 Module supports only one card.
1715 Module has no enable and index options.
1717 The power-management is supported.
1722 Module for 8-bit SoundBlaster cards: SoundBlaster 1.0,
1726 port - port # for SB DSP chip (0x220,0x240,0x260)
1727 irq - IRQ # for SB DSP chip (5,7,9,10)
1728 dma8 - DMA # for SB DSP chip (1,3)
1730 This module supports multiple cards and autoprobe.
1732 The power-management is supported.
1734 Module snd-sb16 and snd-sbawe
1735 -----------------------------
1737 Module for 16-bit SoundBlaster cards: SoundBlaster 16 (PnP),
1738 SoundBlaster AWE 32 (PnP),
1739 SoundBlaster AWE 64 PnP
1741 mic_agc - Mic Auto-Gain-Control - 0 = disable, 1 = enable (default)
1742 csp - ASP/CSP chip support - 0 = disable (default), 1 = enable
1743 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1745 with isapnp=0, the following options are available:
1747 port - port # for SB DSP 4.x chip (0x220,0x240,0x260)
1748 mpu_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1749 awe_port - base port # for EMU8000 synthesizer (0x620,0x640,0x660)
1750 (snd-sbawe module only)
1751 irq - IRQ # for SB DSP 4.x chip (5,7,9,10)
1752 dma8 - 8-bit DMA # for SB DSP 4.x chip (0,1,3)
1753 dma16 - 16-bit DMA # for SB DSP 4.x chip (5,6,7)
1755 This module supports multiple cards, autoprobe and ISA PnP.
1757 Note: To use Vibra16X cards in 16-bit half duplex mode, you must
1758 disable 16bit DMA with dma16 = -1 module parameter.
1759 Also, all Sound Blaster 16 type cards can operate in 16-bit
1760 half duplex mode through 8-bit DMA channel by disabling their
1763 The power-management is supported.
1768 Module for Gallant SC-6000 soundcard.
1770 port - Port # (0x220 or 0x240)
1771 mss_port - MSS Port # (0x530 or 0xe80)
1772 irq - IRQ # (5,7,9,10,11)
1773 mpu_irq - MPU-401 IRQ # (5,7,9,10) ,0 - no MPU-401 irq
1776 This module supports multiple cards.
1778 This card is also known as Audio Excel DSP 16 or Zoltrix AV302.
1783 Module for Aztech Sound Galaxy sound card.
1785 sbport - Port # for SB16 interface (0x220,0x240)
1786 wssport - Port # for WSS interface (0x530,0xe80,0xf40,0x604)
1787 irq - IRQ # (7,9,10,11)
1790 This module supports multiple cards.
1792 The power-management is supported.
1797 Module for ENSONIQ SoundScape PnP cards.
1799 port - Port # (PnP setup)
1800 wss_port - WSS Port # (PnP setup)
1801 irq - IRQ # (PnP setup)
1802 mpu_irq - MPU-401 IRQ # (PnP setup)
1803 dma - DMA # (PnP setup)
1804 dma2 - 2nd DMA # (PnP setup, -1 to disable)
1806 This module supports multiple cards. ISA PnP must be enabled.
1807 You need sscape_ctl tool in alsa-tools package for loading
1810 Module snd-sun-amd7930 (on sparc only)
1811 --------------------------------------
1813 Module for AMD7930 sound chips found on Sparcs.
1815 This module supports multiple cards.
1817 Module snd-sun-cs4231 (on sparc only)
1818 -------------------------------------
1820 Module for CS4231 sound chips found on Sparcs.
1822 This module supports multiple cards.
1824 Module snd-sun-dbri (on sparc only)
1825 -----------------------------------
1827 Module for DBRI sound chips found on Sparcs.
1829 This module supports multiple cards.
1831 Module snd-wavefront
1832 --------------------
1834 Module for Turtle Beach Maui, Tropez and Tropez+ sound cards.
1836 use_cs4232_midi - Use CS4232 MPU-401 interface
1837 (inaccessibly located inside your computer)
1838 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1840 with isapnp=0, the following options are available:
1842 cs4232_pcm_port - Port # for CS4232 PCM interface.
1843 cs4232_pcm_irq - IRQ # for CS4232 PCM interface (5,7,9,11,12,15).
1844 cs4232_mpu_port - Port # for CS4232 MPU-401 interface.
1845 cs4232_mpu_irq - IRQ # for CS4232 MPU-401 interface (9,11,12,15).
1846 ics2115_port - Port # for ICS2115
1847 ics2115_irq - IRQ # for ICS2115
1848 fm_port - FM OPL-3 Port #
1849 dma1 - DMA1 # for CS4232 PCM interface.
1850 dma2 - DMA2 # for CS4232 PCM interface.
1852 The below are options for wavefront_synth features:
1853 wf_raw - Assume that we need to boot the OS (default:no)
1854 If yes, then during driver loading, the state of the board is
1855 ignored, and we reset the board and load the firmware anyway.
1856 fx_raw - Assume that the FX process needs help (default:yes)
1857 If false, we'll leave the FX processor in whatever state it is
1858 when the driver is loaded. The default is to download the
1859 microprogram and associated coefficients to set it up for
1860 "default" operation, whatever that means.
1861 debug_default - Debug parameters for card initialization
1862 wait_usecs - How long to wait without sleeping, usecs
1864 This magic number seems to give pretty optimal throughput
1865 based on my limited experimentation.
1866 If you want to play around with it and find a better value, be
1867 my guest. Remember, the idea is to get a number that causes us
1868 to just busy wait for as many WaveFront commands as possible,
1869 without coming up with a number so large that we hog the whole
1871 Specifically, with this number, out of about 134,000 status
1872 waits, only about 250 result in a sleep.
1873 sleep_interval - How long to sleep when waiting for reply
1875 sleep_tries - How many times to try sleeping during a wait
1877 ospath - Pathname to processed ICS2115 OS firmware
1878 (default:wavefront.os)
1879 The path name of the ISC2115 OS firmware. In the recent
1880 version, it's handled via firmware loader framework, so it
1881 must be installed in the proper path, typically,
1883 reset_time - How long to wait for a reset to take effect
1885 ramcheck_time - How many seconds to wait for the RAM test
1887 osrun_time - How many seconds to wait for the ICS2115 OS
1890 This module supports multiple cards and ISA PnP.
1892 Note: the firmware file "wavefront.os" was located in the earlier
1893 version in /etc. Now it's loaded via firmware loader, and
1894 must be in the proper firmware path, such as /lib/firmware.
1895 Copy (or symlink) the file appropriately if you get an error
1896 regarding firmware downloading after upgrading the kernel.
1898 Module snd-sonicvibes
1899 ---------------------
1901 Module for S3 SonicVibes PCI sound cards.
1902 * PINE Schubert 32 PCI
1904 reverb - Reverb Enable - 1 = enable, 0 = disable (default)
1905 - SoundCard must have onboard SRAM for this.
1906 mge - Mic Gain Enable - 1 = enable, 0 = disable (default)
1908 This module supports multiple cards and autoprobe.
1910 Module snd-serial-u16550
1911 ------------------------
1913 Module for UART16550A serial MIDI ports.
1915 port - port # for UART16550A chip
1916 irq - IRQ # for UART16550A chip, -1 = poll mode
1917 speed - speed in bauds (9600,19200,38400,57600,115200)
1919 base - base for divisor in bauds (57600,115200,230400,460800)
1921 outs - number of MIDI ports in a serial port (1-4)
1923 adaptor - Type of adaptor.
1924 0 = Soundcanvas, 1 = MS-124T, 2 = MS-124W S/A,
1925 3 = MS-124W M/B, 4 = Generic
1927 This module supports multiple cards. This module does not support autoprobe
1928 thus the main port must be specified!!! Other options are optional.
1933 Module for Trident 4DWave DX/NX sound cards.
1934 * Best Union Miss Melody 4DWave PCI
1936 * Warpspeed ONSpeed 4DWave PCI
1939 * CHIC True Sound 4Dwave
1940 * Shark Predator4D-PCI
1941 * Jaton SonicWave 4D
1943 pcm_channels - max channels (voices) reserved for PCM
1944 wavetable_size - max wavetable size in kB (4-?kb)
1946 This module supports multiple cards and autoprobe.
1948 The power-management is supported.
1950 Module snd-usb-audio
1951 --------------------
1953 Module for USB audio and USB MIDI devices.
1955 vid - Vendor ID for the device (optional)
1956 pid - Product ID for the device (optional)
1957 device_setup - Device specific magic number (optional)
1958 - Influence depends on the device
1961 This module supports multiple devices, autoprobe and hotplugging.
1963 Module snd-usb-caiaq
1964 --------------------
1966 Module for caiaq UB audio interfaces,
1967 * Native Instruments RigKontrol2
1968 * Native Instruments Kore Controller
1969 * Native Instruments Audio Kontrol 1
1970 * Native Instruments Audio 8 DJ
1972 This module supports multiple devices, autoprobe and hotplugging.
1974 Module snd-usb-usx2y
1975 --------------------
1977 Module for Tascam USB US-122, US-224 and US-428 devices.
1979 This module supports multiple devices, autoprobe and hotplugging.
1981 Note: you need to load the firmware via usx2yloader utility included
1982 in alsa-tools and alsa-firmware packages.
1987 Module for AC'97 motherboards based on VIA 82C686A/686B, 8233,
1988 8233A, 8233C, 8235, 8237 (south) bridge.
1990 mpu_port - 0x300,0x310,0x320,0x330, otherwise obtain BIOS setup
1992 joystick - Enable joystick (default off) [VIA686A/686B only]
1993 ac97_clock - AC'97 codec clock base (default 48000Hz)
1994 dxs_support - support DXS channels,
1995 0 = auto (default), 1 = enable, 2 = disable,
1996 3 = 48k only, 4 = no VRA, 5 = enable any sample
1997 rate and different sample rates on different
1999 [VIA8233/C, 8235, 8237 only]
2000 ac97_quirk - AC'97 workaround for strange hardware
2001 See "AC97 Quirk Option" section below.
2003 This module supports one chip and autoprobe.
2005 Note: on some SMP motherboards like MSI 694D the interrupts might
2006 not be generated properly. In such a case, please try to
2007 set the SMP (or MPS) version on BIOS to 1.1 instead of
2008 default value 1.4. Then the interrupt number will be
2009 assigned under 15. You might also upgrade your BIOS.
2011 Note: VIA8233/5/7 (not VIA8233A) can support DXS (direct sound)
2012 channels as the first PCM. On these channels, up to 4
2013 streams can be played at the same time, and the controller
2014 can perform sample rate conversion with separate rates for
2016 As default (dxs_support = 0), 48k fixed rate is chosen
2017 except for the known devices since the output is often
2018 noisy except for 48k on some mother boards due to the
2020 Please try once dxs_support=5 and if it works on other
2021 sample rates (e.g. 44.1kHz of mp3 playback), please let us
2022 know the PCI subsystem vendor/device id's (output of
2024 If dxs_support=5 does not work, try dxs_support=4; if it
2025 doesn't work too, try dxs_support=1. (dxs_support=1 is
2026 usually for old motherboards. The correct implemented
2027 board should work with 4 or 5.) If it still doesn't
2028 work and the default setting is ok, dxs_support=3 is the
2029 right choice. If the default setting doesn't work at all,
2030 try dxs_support=2 to disable the DXS channels.
2031 In any cases, please let us know the result and the
2032 subsystem vendor/device ids. See "Links and Addresses"
2035 Note: for the MPU401 on VIA823x, use snd-mpu401 driver
2036 additionally. The mpu_port option is for VIA686 chips only.
2038 The power-management is supported.
2040 Module snd-via82xx-modem
2041 ------------------------
2043 Module for VIA82xx AC97 modem
2045 ac97_clock - AC'97 codec clock base (default 48000Hz)
2047 This module supports one card and autoprobe.
2049 Note: The default index value of this module is -2, i.e. the first
2052 The power-management is supported.
2057 Module for virtual rawmidi devices.
2058 This module creates virtual rawmidi devices which communicate
2059 to the corresponding ALSA sequencer ports.
2061 midi_devs - MIDI devices # (1-4, default=4)
2063 This module supports multiple cards.
2068 Module for sound cards based on the Asus AV200 chip, i.e.,
2069 Xonar D2 and Xonar D2X.
2071 This module supports autoprobe and multiple cards.
2073 Power management is _not_ supported.
2078 Module for Digigram VX-Pocket VX222, V222 v2 and Mic cards.
2080 mic - Enable Microphone on V222 Mic (NYI)
2081 ibl - Capture IBL size. (default = 0, minimum size)
2083 This module supports multiple cards.
2085 When the driver is compiled as a module and the hotplug firmware
2086 is supported, the firmware data is loaded via hotplug automatically.
2087 Install the necessary firmware files in alsa-firmware package.
2088 When no hotplug fw loader is available, you need to load the
2089 firmware via vxloader utility in alsa-tools package. To invoke
2090 vxloader automatically, add the following to /etc/modprobe.conf
2092 install snd-vx222 /sbin/modprobe --first-time -i snd-vx222 && /usr/bin/vxloader
2094 (for 2.2/2.4 kernels, add "post-install /usr/bin/vxloader" to
2095 /etc/modules.conf, instead.)
2096 IBL size defines the interrupts period for PCM. The smaller size
2097 gives smaller latency but leads to more CPU consumption, too.
2098 The size is usually aligned to 126. As default (=0), the smallest
2099 size is chosen. The possible IBL values can be found in
2100 /proc/asound/cardX/vx-status proc file.
2102 The power-management is supported.
2107 Module for Digigram VX-Pocket VX2 and 440 PCMCIA cards.
2109 ibl - Capture IBL size. (default = 0, minimum size)
2111 This module supports multiple cards. The module is compiled only when
2112 PCMCIA is supported on kernel.
2114 With the older 2.6.x kernel, to activate the driver via the card
2115 manager, you'll need to set up /etc/pcmcia/vxpocket.conf. See the
2116 sound/pcmcia/vx/vxpocket.c. 2.6.13 or later kernel requires no
2117 longer require a config file.
2119 When the driver is compiled as a module and the hotplug firmware
2120 is supported, the firmware data is loaded via hotplug automatically.
2121 Install the necessary firmware files in alsa-firmware package.
2122 When no hotplug fw loader is available, you need to load the
2123 firmware via vxloader utility in alsa-tools package.
2125 About capture IBL, see the description of snd-vx222 module.
2127 Note: snd-vxp440 driver is merged to snd-vxpocket driver since
2130 The power-management is supported.
2135 Module for Yamaha PCI chips (YMF72x, YMF74x & YMF75x).
2137 mpu_port - 0x300,0x330,0x332,0x334, 0 (disable) by default,
2138 1 (auto-detect for YMF744/754 only)
2139 fm_port - 0x388,0x398,0x3a0,0x3a8, 0 (disable) by default
2140 1 (auto-detect for YMF744/754 only)
2141 joystick_port - 0x201,0x202,0x204,0x205, 0 (disable) by default,
2143 rear_switch - enable shared rear/line-in switch (bool)
2145 This module supports autoprobe and multiple chips.
2147 The power-management is supported.
2149 Module snd-pdaudiocf
2150 --------------------
2152 Module for Sound Core PDAudioCF sound card.
2154 The power-management is supported.
2160 The ac97_quirk option is used to enable/override the workaround for
2161 specific devices on drivers for on-board AC'97 controllers like
2162 snd-intel8x0. Some hardware have swapped output pins between Master
2163 and Headphone, or Surround (thanks to confusion of AC'97
2164 specifications from version to version :-)
2166 The driver provides the auto-detection of known problematic devices,
2167 but some might be unknown or wrongly detected. In such a case, pass
2168 the proper value with this option.
2170 The following strings are accepted:
2171 - default Don't override the default setting
2172 - none Disable the quirk
2173 - hp_only Bind Master and Headphone controls as a single control
2174 - swap_hp Swap headphone and master controls
2175 - swap_surround Swap master and surround controls
2176 - ad_sharing For AD1985, turn on OMS bit and use headphone
2177 - alc_jack For ALC65x, turn on the jack sense mode
2178 - inv_eapd Inverted EAPD implementation
2179 - mute_led Bind EAPD bit for turning on/off mute LED
2181 For backward compatibility, the corresponding integer value -1, 0,
2182 ... are accepted, too.
2184 For example, if "Master" volume control has no effect on your device
2185 but only "Headphone" does, pass ac97_quirk=hp_only module option.
2188 Configuring Non-ISAPNP Cards
2189 ============================
2191 When the kernel is configured with ISA-PnP support, the modules
2192 supporting the isapnp cards will have module options "isapnp".
2193 If this option is set, *only* the ISA-PnP devices will be probed.
2194 For probing the non ISA-PnP cards, you have to pass "isapnp=0" option
2195 together with the proper i/o and irq configuration.
2197 When the kernel is configured without ISA-PnP support, isapnp option
2198 will be not built in.
2201 Module Autoloading Support
2202 ==========================
2204 The ALSA drivers can be loaded automatically on demand by defining
2205 module aliases. The string 'snd-card-%1' is requested for ALSA native
2206 devices where %i is sound card number from zero to seven.
2208 To auto-load an ALSA driver for OSS services, define the string
2209 'sound-slot-%i' where %i means the slot number for OSS, which
2210 corresponds to the card index of ALSA. Usually, define this
2211 as the same card module.
2213 An example configuration for a single emu10k1 card is like below:
2214 ----- /etc/modprobe.conf
2215 alias snd-card-0 snd-emu10k1
2216 alias sound-slot-0 snd-emu10k1
2217 ----- /etc/modprobe.conf
2219 The available number of auto-loaded sound cards depends on the module
2220 option "cards_limit" of snd module. As default it's set to 1.
2221 To enable the auto-loading of multiple cards, specify the number of
2222 sound cards in that option.
2224 When multiple cards are available, it'd better to specify the index
2225 number for each card via module option, too, so that the order of
2226 cards is kept consistent.
2228 An example configuration for two sound cards is like below:
2230 ----- /etc/modprobe.conf
2232 options snd cards_limit=2
2233 alias snd-card-0 snd-interwave
2234 alias snd-card-1 snd-ens1371
2235 options snd-interwave index=0
2236 options snd-ens1371 index=1
2238 alias sound-slot-0 snd-interwave
2239 alias sound-slot-1 snd-ens1371
2240 ----- /etc/modprobe.conf
2242 In this example, the interwave card is always loaded as the first card
2243 (index 0) and ens1371 as the second (index 1).
2245 Alternative (and new) way to fixate the slot assignment is to use
2246 "slots" option of snd module. In the case above, specify like the
2249 options snd slots=snd-interwave,snd-ens1371
2251 Then, the first slot (#0) is reserved for snd-interwave driver, and
2252 the second (#1) for snd-ens1371. You can omit index option in each
2253 driver if slots option is used (although you can still have them at
2254 the same time as long as they don't conflict).
2256 The slots option is especially useful for avoiding the possible
2257 hot-plugging and the resultant slot conflict. For example, in the
2258 case above again, the first two slots are already reserved. If any
2259 other driver (e.g. snd-usb-audio) is loaded before snd-interwave or
2260 snd-ens1371, it will be assigned to the third or later slot.
2263 ALSA PCM devices to OSS devices mapping
2264 =======================================
2266 /dev/snd/pcmC0D0[c|p] -> /dev/audio0 (/dev/audio) -> minor 4
2267 /dev/snd/pcmC0D0[c|p] -> /dev/dsp0 (/dev/dsp) -> minor 3
2268 /dev/snd/pcmC0D1[c|p] -> /dev/adsp0 (/dev/adsp) -> minor 12
2269 /dev/snd/pcmC1D0[c|p] -> /dev/audio1 -> minor 4+16 = 20
2270 /dev/snd/pcmC1D0[c|p] -> /dev/dsp1 -> minor 3+16 = 19
2271 /dev/snd/pcmC1D1[c|p] -> /dev/adsp1 -> minor 12+16 = 28
2272 /dev/snd/pcmC2D0[c|p] -> /dev/audio2 -> minor 4+32 = 36
2273 /dev/snd/pcmC2D0[c|p] -> /dev/dsp2 -> minor 3+32 = 39
2274 /dev/snd/pcmC2D1[c|p] -> /dev/adsp2 -> minor 12+32 = 44
2276 The first number from /dev/snd/pcmC{X}D{Y}[c|p] expression means
2277 sound card number and second means device number. The ALSA devices
2278 have either 'c' or 'p' suffix indicating the direction, capture and
2279 playback, respectively.
2281 Please note that the device mapping above may be varied via the module
2282 options of snd-pcm-oss module.
2285 Proc interfaces (/proc/asound)
2286 ==============================
2288 /proc/asound/card#/pcm#[cp]/oss
2289 -------------------------------
2290 String "erase" - erase all additional informations about OSS applications
2291 String "<app_name> <fragments> <fragment_size> [<options>]"
2293 <app_name> - name of application with (higher priority) or without path
2294 <fragments> - number of fragments or zero if auto
2295 <fragment_size> - size of fragment in bytes or zero if auto
2296 <options> - optional parameters
2297 - disable the application tries to open a pcm device for
2298 this channel but does not want to use it.
2299 (Cause a bug or mmap needs)
2300 It's good for Quake etc...
2301 - direct don't use plugins
2302 - block force block mode (rvplayer)
2303 - non-block force non-block mode
2304 - whole-frag write only whole fragments (optimization affecting
2306 - no-silence do not fill silence ahead to avoid clicks
2307 - buggy-ptr Returns the whitespace blocks in GETOPTR ioctl
2308 instead of filled blocks
2310 Example: echo "x11amp 128 16384" > /proc/asound/card0/pcm0p/oss
2311 echo "squake 0 0 disable" > /proc/asound/card0/pcm0c/oss
2312 echo "rvplayer 0 0 block" > /proc/asound/card0/pcm0p/oss
2315 Early Buffer Allocation
2316 =======================
2318 Some drivers (e.g. hdsp) require the large contiguous buffers, and
2319 sometimes it's too late to find such spaces when the driver module is
2320 actually loaded due to memory fragmentation. You can pre-allocate the
2321 PCM buffers by loading snd-page-alloc module and write commands to its
2322 proc file in prior, for example, in the early boot stage like
2323 /etc/init.d/*.local scripts.
2325 Reading the proc file /proc/drivers/snd-page-alloc shows the current
2326 usage of page allocation. In writing, you can send the following
2327 commands to the snd-page-alloc driver:
2329 - add VENDOR DEVICE MASK SIZE BUFFERS
2331 VENDOR and DEVICE are PCI vendor and device IDs. They take
2332 integer numbers (0x prefix is needed for the hex).
2333 MASK is the PCI DMA mask. Pass 0 if not restricted.
2334 SIZE is the size of each buffer to allocate. You can pass
2335 k and m suffix for KB and MB. The max number is 16MB.
2336 BUFFERS is the number of buffers to allocate. It must be greater
2337 than 0. The max number is 4.
2341 This will erase the all pre-allocated buffers which are not in
2348 ALSA project homepage
2349 http://www.alsa-project.org
2351 ALSA Bug Tracking System
2352 https://bugtrack.alsa-project.org/bugs/
2355 mailto:alsa-devel@alsa-project.org
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