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 sound cards based on Aztech System AZT2320 ISA chip (PnP only).
292 This module supports multiple cards, PnP and autoprobe.
294 The power-management is supported.
299 Module for sound cards based on Aztech AZF3328 PCI chip.
301 joystick - Enable joystick (default off)
303 This module supports multiple cards.
308 Module for video cards based on Bt87x chips.
310 digital_rate - Override the default digital rate (Hz)
311 load_all - Load the driver even if the card model isn't known
313 This module supports multiple cards.
315 Note: The default index value of this module is -2, i.e. the first
321 Module for Creative Audigy LS and SB Live 24bit
323 This module supports multiple cards.
329 Module for sound cards based on C-Media CMI8330 ISA chips.
331 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
333 with isapnp=0, the following options are available:
335 wssport - port # for CMI8330 chip (WSS)
336 wssirq - IRQ # for CMI8330 chip (WSS)
337 wssdma - first DMA # for CMI8330 chip (WSS)
338 sbport - port # for CMI8330 chip (SB16)
339 sbirq - IRQ # for CMI8330 chip (SB16)
340 sbdma8 - 8bit DMA # for CMI8330 chip (SB16)
341 sbdma16 - 16bit DMA # for CMI8330 chip (SB16)
343 This module supports multiple cards and autoprobe.
345 The power-management is supported.
350 Module for C-Media CMI8338/8738/8768/8770 PCI sound cards.
352 mpu_port - port address of MIDI interface (8338 only):
353 0x300,0x310,0x320,0x330 = legacy port,
354 0 = disable (default)
355 fm_port - port address of OPL-3 FM synthesizer (8x38 only):
357 1 = integrated PCI port (default on 8738),
359 soft_ac3 - Software-conversion of raw SPDIF packets (model 033 only)
361 joystick_port - Joystick port address (0 = disable, 1 = auto-detect)
363 This module supports autoprobe and multiple cards.
365 The power-management is supported.
370 Module for sound cards based on CS4231 ISA chips.
372 port - port # for CS4231 chip
373 mpu_port - port # for MPU-401 UART (optional), -1 = disable
374 irq - IRQ # for CS4231 chip
375 mpu_irq - IRQ # for MPU-401 UART
376 dma1 - first DMA # for CS4231 chip
377 dma2 - second DMA # for CS4231 chip
379 This module supports multiple cards. This module does not support autoprobe
380 thus main port must be specified!!! Other ports are optional.
382 The power-management is supported.
387 Module for sound cards based on CS4232/CS4232A ISA chips.
389 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
391 with isapnp=0, the following options are available:
393 port - port # for CS4232 chip (PnP setup - 0x534)
394 cport - control port # for CS4232 chip (PnP setup - 0x120,0x210,0xf00)
395 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
396 fm_port - FM port # for CS4232 chip (PnP setup - 0x388), -1 = disable
397 irq - IRQ # for CS4232 chip (5,7,9,11,12,15)
398 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
399 dma1 - first DMA # for CS4232 chip (0,1,3)
400 dma2 - second DMA # for Yamaha CS4232 chip (0,1,3), -1 = disable
402 This module supports multiple cards. This module does not support autoprobe
403 (if ISA PnP is not used) thus main port must be specified!!! Other ports are
406 The power-management is supported.
411 Module for sound cards based on CS4235/CS4236/CS4236B/CS4237B/
412 CS4238B/CS4239 ISA chips.
414 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
416 with isapnp=0, the following options are available:
418 port - port # for CS4236 chip (PnP setup - 0x534)
419 cport - control port # for CS4236 chip (PnP setup - 0x120,0x210,0xf00)
420 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
421 fm_port - FM port # for CS4236 chip (PnP setup - 0x388), -1 = disable
422 irq - IRQ # for CS4236 chip (5,7,9,11,12,15)
423 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
424 dma1 - first DMA # for CS4236 chip (0,1,3)
425 dma2 - second DMA # for CS4236 chip (0,1,3), -1 = disable
427 This module supports multiple cards. This module does not support autoprobe
428 (if ISA PnP is not used) thus main port and control port must be
429 specified!!! Other ports are optional.
431 The power-management is supported.
436 Module for Cirrus Logic CS4281 soundchip.
438 dual_codec - Secondary codec ID (0 = disable, default)
440 This module supports multiple cards.
442 The power-management is supported.
447 Module for PCI sound cards based on CS4610/CS4612/CS4614/CS4615/CS4622/
448 CS4624/CS4630/CS4280 PCI chips.
450 external_amp - Force to enable external amplifier.
451 thinkpad - Force to enable Thinkpad's CLKRUN control.
452 mmap_valid - Support OSS mmap mode (default = 0).
454 This module supports multiple cards and autoprobe.
455 Usually external amp and CLKRUN controls are detected automatically
456 from PCI sub vendor/device ids. If they don't work, give the options
459 The power-management is supported.
464 Module for Cyrix/NatSemi Geode 5530 chip.
466 Module snd-cs5535audio
467 ----------------------
469 Module for multifunction CS5535 companion PCI device
471 The power-management is supported.
476 Module for Echoaudio Darla20
478 This module supports multiple cards.
479 The driver requires the firmware loader support on kernel.
484 Module for Echoaudio Darla24
486 This module supports multiple cards.
487 The driver requires the firmware loader support on kernel.
492 Module for Diamond Technologies DT-019X / Avance Logic ALS-007 (PnP
495 This module supports multiple cards. This module is enabled only with
498 The power-management is supported.
503 Module for the dummy sound card. This "card" doesn't do any output
504 or input, but you may use this module for any application which
505 requires a sound card (like RealPlayer).
507 The power-management is supported.
512 Module for Echoaudio 3G cards (Gina3G/Layla3G)
514 This module supports multiple cards.
515 The driver requires the firmware loader support on kernel.
520 Module for EMU10K1/EMU10k2 based PCI sound cards.
521 * Sound Blaster Live!
522 * Sound Blaster PCI 512
523 * Emu APS (partially supported)
524 * Sound Blaster Audigy
526 extin - bitmap of available external inputs for FX8010 (see bellow)
527 extout - bitmap of available external outputs for FX8010 (see bellow)
528 seq_ports - allocated sequencer ports (4 by default)
529 max_synth_voices - limit of voices used for wavetable (64 by default)
530 max_buffer_size - specifies the maximum size of wavetable/pcm buffers
531 given in MB unit. Default value is 128.
532 enable_ir - enable IR
534 This module supports multiple cards and autoprobe.
536 Input & Output configurations [extin/extout]
537 * Creative Card wo/Digital out [0x0003/0x1f03]
538 * Creative Card w/Digital out [0x0003/0x1f0f]
539 * Creative Card w/Digital CD in [0x000f/0x1f0f]
540 * Creative Card wo/Digital out + LiveDrive [0x3fc3/0x1fc3]
541 * Creative Card w/Digital out + LiveDrive [0x3fc3/0x1fcf]
542 * Creative Card w/Digital CD in + LiveDrive [0x3fcf/0x1fcf]
543 * Creative Card wo/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
544 * Creative Card w/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
545 * Creative Card w/Digital CD in + Digital I/O 2 [0x0fcf/0x1f0f]
546 * Creative Card 5.1/w Digital out + LiveDrive [0x3fc3/0x1fff]
547 * Creative Card 5.1 (c) 2003 [0x3fc3/0x7cff]
548 * Creative Card all ins and outs [0x3fff/0x7fff]
550 The power-management is supported.
555 Module for Creative Emu10k1X (SB Live Dell OEM version)
557 This module supports multiple cards.
562 Module for Ensoniq AudioPCI ES1370 PCI sound cards.
563 * SoundBlaster PCI 64
564 * SoundBlaster PCI 128
566 joystick - Enable joystick (default off)
568 This module supports multiple cards and autoprobe.
570 The power-management is supported.
575 Module for Ensoniq AudioPCI ES1371 PCI sound cards.
576 * SoundBlaster PCI 64
577 * SoundBlaster PCI 128
578 * SoundBlaster Vibra PCI
580 joystick_port - port # for joystick (0x200,0x208,0x210,0x218),
581 0 = disable (default), 1 = auto-detect
583 This module supports multiple cards and autoprobe.
585 The power-management is supported.
590 Module for sound cards based on ESS ES968 chip (PnP only).
592 This module supports multiple cards, PnP and autoprobe.
594 The power-management is supported.
599 Module for ESS AudioDrive ES-1688 and ES-688 sound cards.
601 port - port # for ES-1688 chip (0x220,0x240,0x260)
602 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
603 irq - IRQ # for ES-1688 chip (5,7,9,10)
604 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
605 dma8 - DMA # for ES-1688 chip (0,1,3)
607 This module supports multiple cards and autoprobe (without MPU-401 port).
612 Module for ESS AudioDrive ES-18xx sound cards.
614 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
616 with isapnp=0, the following options are available:
618 port - port # for ES-18xx chip (0x220,0x240,0x260)
619 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
620 fm_port - port # for FM (optional, not used)
621 irq - IRQ # for ES-18xx chip (5,7,9,10)
622 dma1 - first DMA # for ES-18xx chip (0,1,3)
623 dma2 - first DMA # for ES-18xx chip (0,1,3)
625 This module supports multiple cards, ISA PnP and autoprobe (without MPU-401
626 port if native ISA PnP routines are not used).
627 When dma2 is equal with dma1, the driver works as half-duplex.
629 The power-management is supported.
634 Module for sound cards based on ESS Solo-1 (ES1938,ES1946) chips.
636 This module supports multiple cards and autoprobe.
638 The power-management is supported.
643 Module for sound cards based on ESS Maestro-1/2/2E (ES1968/ES1978) chips.
645 total_bufsize - total buffer size in kB (1-4096kB)
646 pcm_substreams_p - playback channels (1-8, default=2)
647 pcm_substreams_c - capture channels (1-8, default=0)
648 clock - clock (0 = auto-detection)
649 use_pm - support the power-management (0 = off, 1 = on,
651 enable_mpu - enable MPU401 (0 = off, 1 = on, 2 = auto (default))
652 joystick - enable joystick (default off)
654 This module supports multiple cards and autoprobe.
656 The power-management is supported.
661 Module for ForteMedia FM801 based PCI sound cards.
663 tea575x_tuner - Enable TEA575x tuner
664 - 1 = MediaForte 256-PCS
665 - 2 = MediaForte 256-PCPR
666 - 3 = MediaForte 64-PCR
667 - High 16-bits are video (radio) device number + 1
668 - example: 0x10002 (MediaForte 256-PCPR, device 1)
670 This module supports multiple cards and autoprobe.
672 The power-management is supported.
677 Module for Echoaudio Gina20
679 This module supports multiple cards.
680 The driver requires the firmware loader support on kernel.
685 Module for Echoaudio Gina24
687 This module supports multiple cards.
688 The driver requires the firmware loader support on kernel.
690 Module snd-gusclassic
691 ---------------------
693 Module for Gravis UltraSound Classic sound card.
695 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
696 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
697 dma1 - DMA # for GF1 chip (1,3,5,6,7)
698 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
699 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
700 voices - GF1 voices limit (14-32)
701 pcm_voices - reserved PCM voices
703 This module supports multiple cards and autoprobe.
705 Module snd-gusextreme
706 ---------------------
708 Module for Gravis UltraSound Extreme (Synergy ViperMax) sound card.
710 port - port # for ES-1688 chip (0x220,0x230,0x240,0x250,0x260)
711 gf1_port - port # for GF1 chip (0x210,0x220,0x230,0x240,0x250,0x260,0x270)
712 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable
713 irq - IRQ # for ES-1688 chip (5,7,9,10)
714 gf1_irq - IRQ # for GF1 chip (3,5,9,11,12,15)
715 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
716 dma8 - DMA # for ES-1688 chip (0,1,3)
717 dma1 - DMA # for GF1 chip (1,3,5,6,7)
718 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
719 voices - GF1 voices limit (14-32)
720 pcm_voices - reserved PCM voices
722 This module supports multiple cards and autoprobe (without MPU-401 port).
727 Module for Gravis UltraSound MAX sound card.
729 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
730 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
731 dma1 - DMA # for GF1 chip (1,3,5,6,7)
732 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
733 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
734 voices - GF1 voices limit (14-32)
735 pcm_voices - reserved PCM voices
737 This module supports multiple cards and autoprobe.
742 Module for Intel HD Audio (ICH6, ICH6M, ESB2, ICH7, ICH8),
743 ATI SB450, SB600, RS600,
747 [Multiple options for each card instance]
748 model - force the model name
749 position_fix - Fix DMA pointer (0 = auto, 1 = none, 2 = POSBUF, 3 = FIFO size)
750 probe_mask - Bitmask to probe codecs (default = -1, meaning all slots)
752 [Single (global) options]
753 single_cmd - Use single immediate commands to communicate with
754 codecs (for debugging only)
755 enable_msi - Enable Message Signaled Interrupt (MSI) (default = off)
756 power_save - Automatic power-saving timtout (in second, 0 =
758 power_save_controller - Reset HD-audio controller in power-saving mode
761 This module supports multiple cards and autoprobe.
763 Each codec may have a model table for different configurations.
764 If your machine isn't listed there, the default (usually minimal)
765 configuration is set up. You can pass "model=<name>" option to
766 specify a certain model in such a case. There are different
767 models depending on the codec chip.
769 Model name Description
770 ---------- -----------
772 3stack 3-jack in back and a headphone out
773 3stack-digout 3-jack in back, a HP out and a SPDIF out
774 5stack 5-jack in back, 2-jack in front
775 5stack-digout 5-jack in back, 2-jack in front, a SPDIF out
776 6stack 6-jack in back, 2-jack in front
777 6stack-digout 6-jack with a SPDIF out
779 z71v 3-jack (HP shared SPDIF)
780 asus 3-jack (ASUS Mobo)
782 asus-dig ASUS with SPDIF out
783 asus-dig2 ASUS with SPDIF out (using GPIO2)
785 fujitsu Fujitsu Laptops (Pi1536)
787 lg LG laptop (m1 express dual)
788 lg-lw LG LW20/LW25 laptop
790 clevo Clevo laptops (m520G, m665n)
791 test for testing/debugging purpose, almost all controls can be
792 adjusted. Appearing only when compiled with
794 auto auto-config reading BIOS (default)
798 hp-3013 HP machines (3013-variant)
799 fujitsu Fujitsu S7020
801 will Will laptops (PB V7900)
802 replacer Replacer 672V
803 basic fixed pin assignment (old default model)
804 test for testing/debugging purpose, almost all controls can
805 adjusted. Appearing only when compiled with
807 auto auto-config reading BIOS (default)
810 fujitsu Fujitsu Laptop
811 hp-bpc HP xw4400/6400/8400/9400 laptops
812 hp-bpc-d7000 HP BPC D7000
813 hp-tc-t5735 HP Thin Client T5735
817 hippo Hippo (ATI) with jack detection, Sony UX-90s
818 hippo_1 Hippo (Benq) with jack detection
819 sony-assamd Sony ASSAMD
820 ultra Samsung Q1 Ultra Vista model
821 basic fixed pin assignment w/o SPDIF
822 auto auto-config reading BIOS (default)
828 dell Dell OEM laptops (Vostro 1200)
829 test for testing/debugging purpose, almost all controls can
830 adjusted. Appearing only when compiled with
832 auto auto-config reading BIOS (default)
835 3stack-dig 3-stack (2-channel) with SPDIF
836 3stack-6ch 3-stack (6-channel)
837 3stack-6ch-dig 3-stack (6-channel) with SPDIF
838 6stack-dig 6-stack with SPDIF
839 lenovo-101e Lenovo laptop
840 eeepc-p701 ASUS Eeepc P701
841 eeepc-ep20 ASUS Eeepc EP20
842 auto auto-config reading BIOS (default)
845 3stack-dig 3-jack with SPDIF I/O
846 6stack-dig 6-jack digital with SPDIF I/O
848 targa Targa T8, MSI-1049 T8
851 macpro MacPro support
852 mbp3 Macbook Pro rev3
853 imac24 iMac 24'' with jack detection
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
860 3stack-6ch 3-jack 6-channel
861 3stack-6ch-dig 3-jack 6-channel with SPDIF I/O
862 6stack-dig-demo 6-jack digital for Intel demo board
863 acer Acer laptops (Travelmate 3012WTMi, Aspire 5600, etc)
864 acer-aspire Acer Aspire 9810
865 medion Medion Laptops
866 medion-md2 Medion MD2
868 targa-2ch-dig Targs/MSI with 2-channel
869 laptop-eapd 3-jack with SPDIF I/O and EAPD (Clevo M540JE, M550JE)
870 lenovo-101e Lenovo 101E
871 lenovo-nb0763 Lenovo NB0763
872 lenovo-ms7195-dig Lenovo MS7195
874 6stack-hp HP machines with 6stack (Nettle boards)
875 3stack-hp HP machines with 3stack (Lucknow, Samba boards)
876 6stack-dell Dell machines with 6stack (Inspiron 530)
878 auto auto-config reading BIOS (default)
882 3stack-dig 3-jack with SPDIF I/O
883 6stack-dig 6-jack with SPDIF I/O
884 3stack-660 3-jack (for ALC660)
885 uniwill-m31 Uniwill M31 laptop
886 toshiba Toshiba laptop support
887 asus Asus laptop support
888 asus-laptop ASUS F2/F3 laptops
889 auto auto-config reading BIOS (default)
893 3stack-dig 3-jack with SPDIF OUT
894 6stack-dig 6-jack with SPDIF OUT
895 3stack-660 3-jack (for ALC660VD)
896 3stack-660-digout 3-jack with SPDIF OUT (for ALC660VD)
897 lenovo Lenovo 3000 C200
898 dallas Dallas laptops
900 auto auto-config reading BIOS (default)
903 minimal 3-jack in back
904 min_fp 3-jack in back, 2-jack in front
905 full 6-jack in back, 2-jack in front
906 full_dig 6-jack in back, 2-jack in front, SPDIF I/O
907 allout 5-jack in back, 2-jack in front, SPDIF out
908 auto auto-config reading BIOS (default)
911 3stack 3-stack mode (default)
918 basic 3-jack (default)
920 thinkpad Lenovo Thinkpad T60/X60/Z60
927 basic default configuration
928 thinkpad Lenovo Thinkpad T61/X61
931 6stack 6-jack, separate surrounds (default)
932 3stack 3-stack, shared surrounds
933 laptop 2-channel only (FSC V2060, Samsung M50)
934 laptop-eapd 2-channel with EAPD (Samsung R65, ASUS A6J)
935 laptop-automute 2-channel with EAPD and HP-automute (Lenovo N100)
936 ultra 2-channel with EAPD (Samsung Ultra tablet PC)
940 6stack-dig ditto with SPDIF
942 3stack-dig ditto with SPDIF
943 laptop 3-jack with hp-jack automute
944 laptop-dig ditto with SPDIF
945 auto auto-config reading BIOS (default)
949 test for testing/debugging purpose, almost all controls
950 can be adjusted. Appearing only when compiled with
954 laptop Basic Laptop config
955 laptop-hp Laptop config for some HP models (subdevice 30A5)
956 laptop-eapd Laptop config with EAPD support
957 test for testing/debugging purpose, almost all controls
958 can be adjusted. Appearing only when compiled with
963 dell-d21 Dell (unknown)
964 dell-d22 Dell (unknown)
965 dell-d23 Dell (unknown)
966 dell-m21 Dell Inspiron 630m, Dell Inspiron 640m
967 dell-m22 Dell Latitude D620, Dell Latitude D820
968 dell-m23 Dell XPS M1710, Dell Precision M90
969 dell-m24 Dell Latitude 120L
970 dell-m25 Dell Inspiron E1505n
971 dell-m26 Dell Inspiron 1501
972 dell-m27 Dell Inspiron E1705/9400
973 gateway Gateway laptops with EAPD control
977 dell-m42 Dell (unknown)
978 dell-m43 Dell Precision
979 dell-m44 Dell Inspiron
984 5stack D945 5stack + SPDIF
985 intel-mac-v1 Intel Mac Type 1
986 intel-mac-v2 Intel Mac Type 2
987 intel-mac-v3 Intel Mac Type 3
988 intel-mac-v4 Intel Mac Type 4
989 intel-mac-v5 Intel Mac Type 5
990 macmini Intel Mac Mini (equivalent with type 3)
991 macbook Intel Mac Book (eq. type 5)
992 macbook-pro-v1 Intel Mac Book Pro 1st generation (eq. type 3)
993 macbook-pro Intel Mac Book Pro 2nd generation (eq. type 3)
994 imac-intel Intel iMac (eq. type 2)
995 imac-intel-20 Intel iMac (newer version) (eq. type 3)
996 dell-d81 Dell (unknown)
997 dell-d82 Dell (unknown)
998 dell-m81 Dell (unknown)
999 dell-m82 Dell XPS M1210
1002 ref Reference board, base config
1003 m2-2 Some Gateway MX series laptops
1004 m6 Some Gateway NX series laptops
1005 pa6 Gateway NX860 series
1007 STAC9227/9228/9229/927x
1010 5stack D965 5stack + SPDIF
1011 dell-3stack Dell Dimension E520
1014 vaio Setup for VAIO FE550G/SZ110
1015 vaio-ar Setup for VAIO AR
1017 The model name "genric" is treated as a special case. When this
1018 model is given, the driver uses the generic codec parser without
1019 "codec-patch". It's sometimes good for testing and debugging.
1021 If the default configuration doesn't work and one of the above
1022 matches with your device, report it together with the PCI
1023 subsystem ID (output of "lspci -nv") to ALSA BTS or alsa-devel
1024 ML (see the section "Links and Addresses").
1026 power_save and power_save_controller options are for power-saving
1027 mode. See powersave.txt for details.
1029 Note 2: If you get click noises on output, try the module option
1030 position_fix=1 or 2. position_fix=1 will use the SD_LPIB
1031 register value without FIFO size correction as the current
1032 DMA pointer. position_fix=2 will make the driver to use
1033 the position buffer instead of reading SD_LPIB register.
1034 (Usually SD_LPLIB register is more accurate than the
1037 NB: If you get many "azx_get_response timeout" messages at
1038 loading, it's likely a problem of interrupts (e.g. ACPI irq
1039 routing). Try to boot with options like "pci=noacpi". Also, you
1040 can try "single_cmd=1" module option. This will switch the
1041 communication method between HDA controller and codecs to the
1042 single immediate commands instead of CORB/RIRB. Basically, the
1043 single command mode is provided only for BIOS, and you won't get
1044 unsolicited events, too. But, at least, this works independently
1045 from the irq. Remember this is a last resort, and should be
1046 avoided as much as possible...
1048 MORE NOTES ON "azx_get_response timeout" PROBLEMS:
1049 On some hardwares, you may need to add a proper probe_mask option
1050 to avoid the "azx_get_response timeout" problem above, instead.
1051 This occurs when the access to non-existing or non-working codec slot
1052 (likely a modem one) causes a stall of the communication via HD-audio
1053 bus. You can see which codec slots are probed by enabling
1054 CONFIG_SND_DEBUG_DETECT, or simply from the file name of the codec
1055 proc files. Then limit the slots to probe by probe_mask option.
1056 For example, probe_mask=1 means to probe only the first slot, and
1057 probe_mask=4 means only the third slot.
1059 The power-management is supported.
1064 Module for RME Hammerfall DSP audio interface(s)
1066 This module supports multiple cards.
1068 Note: The firmware data can be automatically loaded via hotplug
1069 when CONFIG_FW_LOADER is set. Otherwise, you need to load
1070 the firmware via hdsploader utility included in alsa-tools
1072 The firmware data is found in alsa-firmware package.
1074 Note: snd-page-alloc module does the job which snd-hammerfall-mem
1075 module did formerly. It will allocate the buffers in advance
1076 when any HDSP cards are found. To make the buffer
1077 allocation sure, load snd-page-alloc module in the early
1078 stage of boot sequence. See "Early Buffer Allocation"
1084 Module for RME HDSP MADI board.
1086 precise_ptr - Enable precise pointer, or disable.
1087 line_outs_monitor - Send playback streams to analog outs by default.
1088 enable_monitor - Enable Analog Out on Channel 63/64 by default.
1090 See hdspm.txt for details.
1095 Module for Envy24 (ICE1712) based PCI sound cards.
1096 * MidiMan M Audio Delta 1010
1097 * MidiMan M Audio Delta 1010LT
1098 * MidiMan M Audio Delta DiO 2496
1099 * MidiMan M Audio Delta 66
1100 * MidiMan M Audio Delta 44
1101 * MidiMan M Audio Delta 410
1102 * MidiMan M Audio Audiophile 2496
1105 * TerraTec EWX 24/96
1106 * TerraTec DMX 6Fire
1108 * Hoontech SoundTrack DSP 24
1109 * Hoontech SoundTrack DSP 24 Value
1110 * Hoontech SoundTrack DSP 24 Media 7.1
1111 * Event Electronics, EZ8
1113 * Lionstracs, Mediastaton
1115 model - Use the given board model, one of the following:
1116 delta1010, dio2496, delta66, delta44, audiophile, delta410,
1117 delta1010lt, vx442, ewx2496, ews88mt, ews88mt_new, ews88d,
1118 dmx6fire, dsp24, dsp24_value, dsp24_71, ez8,
1119 phase88, mediastation
1120 omni - Omni I/O support for MidiMan M-Audio Delta44/66
1121 cs8427_timeout - reset timeout for the CS8427 chip (S/PDIF transceiver)
1122 in msec resolution, default value is 500 (0.5 sec)
1124 This module supports multiple cards and autoprobe. Note: The consumer part
1125 is not used with all Envy24 based cards (for example in the MidiMan Delta
1128 Note: The supported board is detected by reading EEPROM or PCI
1129 SSID (if EEPROM isn't available). You can override the
1130 model by passing "model" module option in case that the
1131 driver isn't configured properly or you want to try another
1137 Module for Envy24HT (VT/ICE1724), Envy24PT (VT1720) based PCI sound cards.
1138 * MidiMan M Audio Revolution 5.1
1139 * MidiMan M Audio Revolution 7.1
1140 * MidiMan M Audio Audiophile 192
1142 * TerraTec Aureon 5.1 Sky
1143 * TerraTec Aureon 7.1 Space
1144 * TerraTec Aureon 7.1 Universe
1147 * AudioTrak Prodigy 7.1
1148 * AudioTrak Prodigy 7.1LT
1149 * AudioTrak Prodigy 192
1151 * Albatron K8X800 Pro II
1152 * Chaintech ZNF3-150
1153 * Chaintech ZNF3-250
1160 model - Use the given board model, one of the following:
1161 revo51, revo71, amp2000, prodigy71, prodigy71lt,
1162 prodigy192, aureon51, aureon71, universe, ap192,
1163 k8x800, phase22, phase28, ms300, av710, se200pci,
1166 This module supports multiple cards and autoprobe.
1168 Note: The supported board is detected by reading EEPROM or PCI
1169 SSID (if EEPROM isn't available). You can override the
1170 model by passing "model" module option in case that the
1171 driver isn't configured properly or you want to try another
1177 Module for Echoaudio Indigo
1179 This module supports multiple cards.
1180 The driver requires the firmware loader support on kernel.
1185 Module for Echoaudio Indigo DJ
1187 This module supports multiple cards.
1188 The driver requires the firmware loader support on kernel.
1193 Module for Echoaudio Indigo IO
1195 This module supports multiple cards.
1196 The driver requires the firmware loader support on kernel.
1201 Module for AC'97 motherboards from Intel and compatibles.
1202 * Intel i810/810E, i815, i820, i830, i84x, MX440
1203 ICH5, ICH6, ICH7, ESB2
1204 * SiS 7012 (SiS 735)
1205 * NVidia NForce, NForce2, NForce3, MCP04, CK804
1207 * AMD AMD768, AMD8111
1210 ac97_clock - AC'97 codec clock base (0 = auto-detect)
1211 ac97_quirk - AC'97 workaround for strange hardware
1212 See "AC97 Quirk Option" section below.
1213 buggy_irq - Enable workaround for buggy interrupts on some
1214 motherboards (default yes on nForce chips,
1216 buggy_semaphore - Enable workaround for hardwares with buggy
1217 semaphores (e.g. on some ASUS laptops)
1219 spdif_aclink - Use S/PDIF over AC-link instead of direct connection
1220 from the controller chip
1221 (0 = off, 1 = on, -1 = default)
1223 This module supports one chip and autoprobe.
1225 Note: the latest driver supports auto-detection of chip clock.
1226 if you still encounter too fast playback, specify the clock
1227 explicitly via the module option "ac97_clock=41194".
1229 Joystick/MIDI ports are not supported by this driver. If your
1230 motherboard has these devices, use the ns558 or snd-mpu401
1231 modules, respectively.
1233 The power-management is supported.
1235 Module snd-intel8x0m
1236 --------------------
1238 Module for Intel ICH (i8x0) chipset MC97 modems.
1239 * Intel i810/810E, i815, i820, i830, i84x, MX440
1241 * SiS 7013 (SiS 735)
1242 * NVidia NForce, NForce2, NForce2s, NForce3
1246 ac97_clock - AC'97 codec clock base (0 = auto-detect)
1248 This module supports one card and autoprobe.
1250 Note: The default index value of this module is -2, i.e. the first
1253 The power-management is supported.
1255 Module snd-interwave
1256 --------------------
1258 Module for Gravis UltraSound PnP, Dynasonic 3-D/Pro, STB Sound Rage 32
1259 and other sound cards based on AMD InterWave (tm) chip.
1261 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
1262 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
1263 pcm_voices - reserved PCM voices for the synthesizer (default 2)
1264 effect - 1 = InterWave effects enable (default 0);
1266 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1268 with isapnp=0, the following options are available:
1270 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
1271 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
1272 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
1273 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
1275 This module supports multiple cards, autoprobe and ISA PnP.
1277 Module snd-interwave-stb
1278 ------------------------
1280 Module for UltraSound 32-Pro (sound card from STB used by Compaq)
1281 and other sound cards based on AMD InterWave (tm) chip with TEA6330T
1282 circuit for extended control of bass, treble and master volume.
1284 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
1285 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
1286 pcm_voices - reserved PCM voices for the synthesizer (default 2)
1287 effect - 1 = InterWave effects enable (default 0);
1289 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1291 with isapnp=0, the following options are available:
1293 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
1294 port_tc - tone control (i2c bus) port # for TEA6330T chip (0x350,0x360,0x370,0x380)
1295 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
1296 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
1297 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
1299 This module supports multiple cards, autoprobe and ISA PnP.
1304 Module for Korg 1212 IO PCI card
1306 This module supports multiple cards.
1311 Module for Echoaudio Layla20
1313 This module supports multiple cards.
1314 The driver requires the firmware loader support on kernel.
1319 Module for Echoaudio Layla24
1321 This module supports multiple cards.
1322 The driver requires the firmware loader support on kernel.
1327 Module for Allegro/Maestro3 chips
1329 external_amp - enable external amp (enabled by default)
1330 amp_gpio - GPIO pin number for external amp (0-15) or
1331 -1 for default pin (8 for allegro, 1 for
1334 This module supports autoprobe and multiple chips.
1336 Note: the binding of amplifier is dependent on hardware.
1337 If there is no sound even though all channels are unmuted, try to
1338 specify other gpio connection via amp_gpio option.
1339 For example, a Panasonic notebook might need "amp_gpio=0x0d"
1342 The power-management is supported.
1347 Module for Echoaudio Mia
1349 This module supports multiple cards.
1350 The driver requires the firmware loader support on kernel.
1355 Module for Miro soundcards: miroSOUND PCM 1 pro,
1357 miroSOUND PCM 20 Radio.
1359 port - Port # (0x530,0x604,0xe80,0xf40)
1360 irq - IRQ # (5,7,9,10,11)
1361 dma1 - 1st dma # (0,1,3)
1362 dma2 - 2nd dma # (0,1)
1363 mpu_port - MPU-401 port # (0x300,0x310,0x320,0x330)
1364 mpu_irq - MPU-401 irq # (5,7,9,10)
1365 fm_port - FM Port # (0x388)
1366 wss - enable WSS mode
1367 ide - enable onboard ide support
1372 Module for Digigram miXart8 sound cards.
1374 This module supports multiple cards.
1375 Note: One miXart8 board will be represented as 4 alsa cards.
1376 See MIXART.txt for details.
1378 When the driver is compiled as a module and the hotplug firmware
1379 is supported, the firmware data is loaded via hotplug automatically.
1380 Install the necessary firmware files in alsa-firmware package.
1381 When no hotplug fw loader is available, you need to load the
1382 firmware via mixartloader utility in alsa-tools package.
1387 Module for Echoaudio Mona
1389 This module supports multiple cards.
1390 The driver requires the firmware loader support on kernel.
1395 Module for MPU-401 UART devices.
1397 port - port number or -1 (disable)
1398 irq - IRQ number or -1 (disable)
1399 pnp - PnP detection - 0 = disable, 1 = enable (default)
1401 This module supports multiple devices and PnP.
1406 Module for MOTU MidiTimePiece AV multiport MIDI (on the parallel
1409 port - I/O port # for MTPAV (0x378,0x278, default=0x378)
1410 irq - IRQ # for MTPAV (7,5, default=7)
1411 hwports - number of supported hardware ports, default=8.
1413 Module supports only 1 card. This module has no enable option.
1418 Module for Ego Systems (ESI) Miditerminal 4140
1420 This module supports multiple devices.
1421 Requires parport (CONFIG_PARPORT).
1426 Module for NeoMagic NM256AV/ZX chips
1428 playback_bufsize - max playback frame size in kB (4-128kB)
1429 capture_bufsize - max capture frame size in kB (4-128kB)
1430 force_ac97 - 0 or 1 (disabled by default)
1431 buffer_top - specify buffer top address
1432 use_cache - 0 or 1 (disabled by default)
1433 vaio_hack - alias buffer_top=0x25a800
1434 reset_workaround - enable AC97 RESET workaround for some laptops
1435 reset_workaround2 - enable extended AC97 RESET workaround for some
1438 This module supports one chip and autoprobe.
1440 The power-management is supported.
1442 Note: on some notebooks the buffer address cannot be detected
1443 automatically, or causes hang-up during initialization.
1444 In such a case, specify the buffer top address explicitly via
1445 the buffer_top option.
1447 Sony F250: buffer_top=0x25a800
1448 Sony F270: buffer_top=0x272800
1449 The driver supports only ac97 codec. It's possible to force
1450 to initialize/use ac97 although it's not detected. In such a
1451 case, use force_ac97=1 option - but *NO* guarantee whether it
1454 Note: The NM256 chip can be linked internally with non-AC97
1455 codecs. This driver supports only the AC97 codec, and won't work
1456 with machines with other (most likely CS423x or OPL3SAx) chips,
1457 even though the device is detected in lspci. In such a case, try
1458 other drivers, e.g. snd-cs4232 or snd-opl3sa2. Some has ISA-PnP
1459 but some doesn't have ISA PnP. You'll need to specify isapnp=0
1460 and proper hardware parameters in the case without ISA PnP.
1462 Note: some laptops need a workaround for AC97 RESET. For the
1463 known hardware like Dell Latitude LS and Sony PCG-F305, this
1464 workaround is enabled automatically. For other laptops with a
1465 hard freeze, you can try reset_workaround=1 option.
1467 Note: Dell Latitude CSx laptops have another problem regarding
1468 AC97 RESET. On these laptops, reset_workaround2 option is
1469 turned on as default. This option is worth to try if the
1470 previous reset_workaround option doesn't help.
1472 Note: This driver is really crappy. It's a porting from the
1473 OSS driver, which is a result of black-magic reverse engineering.
1474 The detection of codec will fail if the driver is loaded *after*
1475 X-server as described above. You might be able to force to load
1476 the module, but it may result in hang-up. Hence, make sure that
1477 you load this module *before* X if you encounter this kind of
1483 Module for Yamaha OPL3-SA2/SA3 sound cards.
1485 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1487 with isapnp=0, the following options are available:
1489 port - control port # for OPL3-SA chip (0x370)
1490 sb_port - SB port # for OPL3-SA chip (0x220,0x240)
1491 wss_port - WSS port # for OPL3-SA chip (0x530,0xe80,0xf40,0x604)
1492 midi_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1493 fm_port - FM port # for OPL3-SA chip (0x388), -1 = disable
1494 irq - IRQ # for OPL3-SA chip (5,7,9,10)
1495 dma1 - first DMA # for Yamaha OPL3-SA chip (0,1,3)
1496 dma2 - second DMA # for Yamaha OPL3-SA chip (0,1,3), -1 = disable
1498 This module supports multiple cards and ISA PnP. It does not support
1499 autoprobe (if ISA PnP is not used) thus all ports must be specified!!!
1501 The power-management is supported.
1503 Module snd-opti92x-ad1848
1504 -------------------------
1506 Module for sound cards based on OPTi 82c92x and Analog Devices AD1848 chips.
1507 Module works with OAK Mozart cards as well.
1509 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1511 with isapnp=0, the following options are available:
1513 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1514 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1515 fm_port - port # for OPL3 device (0x388)
1516 irq - IRQ # for WSS chip (5,7,9,10,11)
1517 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1518 dma1 - first DMA # for WSS chip (0,1,3)
1520 This module supports only one card, autoprobe and PnP.
1522 Module snd-opti92x-cs4231
1523 -------------------------
1525 Module for sound cards based on OPTi 82c92x and Crystal CS4231 chips.
1527 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1529 with isapnp=0, the following options are available:
1531 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1532 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1533 fm_port - port # for OPL3 device (0x388)
1534 irq - IRQ # for WSS chip (5,7,9,10,11)
1535 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1536 dma1 - first DMA # for WSS chip (0,1,3)
1537 dma2 - second DMA # for WSS chip (0,1,3)
1539 This module supports only one card, autoprobe and PnP.
1544 Module for sound cards based on OPTi 82c93x chips.
1546 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1548 with isapnp=0, the following options are available:
1550 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1551 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1552 fm_port - port # for OPL3 device (0x388)
1553 irq - IRQ # for WSS chip (5,7,9,10,11)
1554 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1555 dma1 - first DMA # for WSS chip (0,1,3)
1556 dma2 - second DMA # for WSS chip (0,1,3)
1558 This module supports only one card, autoprobe and PnP.
1563 Module for Digigram PCXHR boards
1565 This module supports multiple cards.
1567 Module snd-portman2x4
1568 ---------------------
1570 Module for Midiman Portman 2x4 parallel port MIDI interface
1572 This module supports multiple cards.
1574 Module snd-powermac (on ppc only)
1575 ---------------------------------
1577 Module for PowerMac, iMac and iBook on-board soundchips
1579 enable_beep - enable beep using PCM (enabled as default)
1581 Module supports autoprobe a chip.
1583 Note: the driver may have problems regarding endianess.
1585 The power-management is supported.
1587 Module snd-pxa2xx-ac97 (on arm only)
1588 ------------------------------------
1590 Module for AC97 driver for the Intel PXA2xx chip
1592 For ARM architecture only.
1594 The power-management is supported.
1599 Module for Conexant Riptide chip
1601 joystick_port - Joystick port # (default: 0x200)
1602 mpu_port - MPU401 port # (default: 0x330)
1603 opl3_port - OPL3 port # (default: 0x388)
1605 This module supports multiple cards.
1606 The driver requires the firmware loader support on kernel.
1607 You need to install the firmware file "riptide.hex" to the standard
1608 firmware path (e.g. /lib/firmware).
1613 Module for RME Digi32, Digi32 Pro and Digi32/8 (Sek'd Prodif32,
1614 Prodif96 and Prodif Gold) sound cards.
1616 This module supports multiple cards.
1621 Module for RME Digi96, Digi96/8 and Digi96/8 PRO/PAD/PST sound cards.
1623 This module supports multiple cards.
1628 Module for RME Digi9652 (Hammerfall, Hammerfall-Light) sound cards.
1630 precise_ptr - Enable precise pointer (doesn't work reliably).
1633 This module supports multiple cards.
1635 Note: snd-page-alloc module does the job which snd-hammerfall-mem
1636 module did formerly. It will allocate the buffers in advance
1637 when any RME9652 cards are found. To make the buffer
1638 allocation sure, load snd-page-alloc module in the early
1639 stage of boot sequence. See "Early Buffer Allocation"
1642 Module snd-sa11xx-uda1341 (on arm only)
1643 ---------------------------------------
1645 Module for Philips UDA1341TS on Compaq iPAQ H3600 sound card.
1647 Module supports only one card.
1648 Module has no enable and index options.
1650 The power-management is supported.
1655 Module for 8-bit SoundBlaster cards: SoundBlaster 1.0,
1659 port - port # for SB DSP chip (0x220,0x240,0x260)
1660 irq - IRQ # for SB DSP chip (5,7,9,10)
1661 dma8 - DMA # for SB DSP chip (1,3)
1663 This module supports multiple cards and autoprobe.
1665 The power-management is supported.
1667 Module snd-sb16 and snd-sbawe
1668 -----------------------------
1670 Module for 16-bit SoundBlaster cards: SoundBlaster 16 (PnP),
1671 SoundBlaster AWE 32 (PnP),
1672 SoundBlaster AWE 64 PnP
1674 mic_agc - Mic Auto-Gain-Control - 0 = disable, 1 = enable (default)
1675 csp - ASP/CSP chip support - 0 = disable (default), 1 = enable
1676 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1678 with isapnp=0, the following options are available:
1680 port - port # for SB DSP 4.x chip (0x220,0x240,0x260)
1681 mpu_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1682 awe_port - base port # for EMU8000 synthesizer (0x620,0x640,0x660)
1683 (snd-sbawe module only)
1684 irq - IRQ # for SB DSP 4.x chip (5,7,9,10)
1685 dma8 - 8-bit DMA # for SB DSP 4.x chip (0,1,3)
1686 dma16 - 16-bit DMA # for SB DSP 4.x chip (5,6,7)
1688 This module supports multiple cards, autoprobe and ISA PnP.
1690 Note: To use Vibra16X cards in 16-bit half duplex mode, you must
1691 disable 16bit DMA with dma16 = -1 module parameter.
1692 Also, all Sound Blaster 16 type cards can operate in 16-bit
1693 half duplex mode through 8-bit DMA channel by disabling their
1696 The power-management is supported.
1701 Module for Gallant SC-6000 soundcard.
1703 port - Port # (0x220 or 0x240)
1704 mss_port - MSS Port # (0x530 or 0xe80)
1705 irq - IRQ # (5,7,9,10,11)
1706 mpu_irq - MPU-401 IRQ # (5,7,9,10) ,0 - no MPU-401 irq
1709 This module supports multiple cards.
1711 This card is also known as Audio Excel DSP 16 or Zoltrix AV302.
1716 Module for Aztech Sound Galaxy sound card.
1718 sbport - Port # for SB16 interface (0x220,0x240)
1719 wssport - Port # for WSS interface (0x530,0xe80,0xf40,0x604)
1720 irq - IRQ # (7,9,10,11)
1723 This module supports multiple cards.
1725 The power-management is supported.
1730 Module for ENSONIQ SoundScape PnP cards.
1732 port - Port # (PnP setup)
1733 wss_port - WSS Port # (PnP setup)
1734 irq - IRQ # (PnP setup)
1735 mpu_irq - MPU-401 IRQ # (PnP setup)
1736 dma - DMA # (PnP setup)
1737 dma2 - 2nd DMA # (PnP setup, -1 to disable)
1739 This module supports multiple cards. ISA PnP must be enabled.
1740 You need sscape_ctl tool in alsa-tools package for loading
1743 Module snd-sun-amd7930 (on sparc only)
1744 --------------------------------------
1746 Module for AMD7930 sound chips found on Sparcs.
1748 This module supports multiple cards.
1750 Module snd-sun-cs4231 (on sparc only)
1751 -------------------------------------
1753 Module for CS4231 sound chips found on Sparcs.
1755 This module supports multiple cards.
1757 Module snd-sun-dbri (on sparc only)
1758 -----------------------------------
1760 Module for DBRI sound chips found on Sparcs.
1762 This module supports multiple cards.
1764 Module snd-wavefront
1765 --------------------
1767 Module for Turtle Beach Maui, Tropez and Tropez+ sound cards.
1769 use_cs4232_midi - Use CS4232 MPU-401 interface
1770 (inaccessibly located inside your computer)
1771 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1773 with isapnp=0, the following options are available:
1775 cs4232_pcm_port - Port # for CS4232 PCM interface.
1776 cs4232_pcm_irq - IRQ # for CS4232 PCM interface (5,7,9,11,12,15).
1777 cs4232_mpu_port - Port # for CS4232 MPU-401 interface.
1778 cs4232_mpu_irq - IRQ # for CS4232 MPU-401 interface (9,11,12,15).
1779 ics2115_port - Port # for ICS2115
1780 ics2115_irq - IRQ # for ICS2115
1781 fm_port - FM OPL-3 Port #
1782 dma1 - DMA1 # for CS4232 PCM interface.
1783 dma2 - DMA2 # for CS4232 PCM interface.
1785 The below are options for wavefront_synth features:
1786 wf_raw - Assume that we need to boot the OS (default:no)
1787 If yes, then during driver loading, the state of the board is
1788 ignored, and we reset the board and load the firmware anyway.
1789 fx_raw - Assume that the FX process needs help (default:yes)
1790 If false, we'll leave the FX processor in whatever state it is
1791 when the driver is loaded. The default is to download the
1792 microprogram and associated coefficients to set it up for
1793 "default" operation, whatever that means.
1794 debug_default - Debug parameters for card initialization
1795 wait_usecs - How long to wait without sleeping, usecs
1797 This magic number seems to give pretty optimal throughput
1798 based on my limited experimentation.
1799 If you want to play around with it and find a better value, be
1800 my guest. Remember, the idea is to get a number that causes us
1801 to just busy wait for as many WaveFront commands as possible,
1802 without coming up with a number so large that we hog the whole
1804 Specifically, with this number, out of about 134,000 status
1805 waits, only about 250 result in a sleep.
1806 sleep_interval - How long to sleep when waiting for reply
1808 sleep_tries - How many times to try sleeping during a wait
1810 ospath - Pathname to processed ICS2115 OS firmware
1811 (default:wavefront.os)
1812 The path name of the ISC2115 OS firmware. In the recent
1813 version, it's handled via firmware loader framework, so it
1814 must be installed in the proper path, typically,
1816 reset_time - How long to wait for a reset to take effect
1818 ramcheck_time - How many seconds to wait for the RAM test
1820 osrun_time - How many seconds to wait for the ICS2115 OS
1823 This module supports multiple cards and ISA PnP.
1825 Note: the firmware file "wavefront.os" was located in the earlier
1826 version in /etc. Now it's loaded via firmware loader, and
1827 must be in the proper firmware path, such as /lib/firmware.
1828 Copy (or symlink) the file appropriately if you get an error
1829 regarding firmware downloading after upgrading the kernel.
1831 Module snd-sonicvibes
1832 ---------------------
1834 Module for S3 SonicVibes PCI sound cards.
1835 * PINE Schubert 32 PCI
1837 reverb - Reverb Enable - 1 = enable, 0 = disable (default)
1838 - SoundCard must have onboard SRAM for this.
1839 mge - Mic Gain Enable - 1 = enable, 0 = disable (default)
1841 This module supports multiple cards and autoprobe.
1843 Module snd-serial-u16550
1844 ------------------------
1846 Module for UART16550A serial MIDI ports.
1848 port - port # for UART16550A chip
1849 irq - IRQ # for UART16550A chip, -1 = poll mode
1850 speed - speed in bauds (9600,19200,38400,57600,115200)
1852 base - base for divisor in bauds (57600,115200,230400,460800)
1854 outs - number of MIDI ports in a serial port (1-4)
1856 adaptor - Type of adaptor.
1857 0 = Soundcanvas, 1 = MS-124T, 2 = MS-124W S/A,
1858 3 = MS-124W M/B, 4 = Generic
1860 This module supports multiple cards. This module does not support autoprobe
1861 thus the main port must be specified!!! Other options are optional.
1866 Module for Trident 4DWave DX/NX sound cards.
1867 * Best Union Miss Melody 4DWave PCI
1869 * Warpspeed ONSpeed 4DWave PCI
1872 * CHIC True Sound 4Dwave
1873 * Shark Predator4D-PCI
1874 * Jaton SonicWave 4D
1876 pcm_channels - max channels (voices) reserved for PCM
1877 wavetable_size - max wavetable size in kB (4-?kb)
1879 This module supports multiple cards and autoprobe.
1881 The power-management is supported.
1883 Module snd-usb-audio
1884 --------------------
1886 Module for USB audio and USB MIDI devices.
1888 vid - Vendor ID for the device (optional)
1889 pid - Product ID for the device (optional)
1890 device_setup - Device specific magic number (optional)
1891 - Influence depends on the device
1894 This module supports multiple devices, autoprobe and hotplugging.
1896 Module snd-usb-caiaq
1897 --------------------
1899 Module for caiaq UB audio interfaces,
1900 * Native Instruments RigKontrol2
1901 * Native Instruments Kore Controller
1902 * Native Instruments Audio Kontrol 1
1903 * Native Instruments Audio 8 DJ
1905 This module supports multiple devices, autoprobe and hotplugging.
1907 Module snd-usb-usx2y
1908 --------------------
1910 Module for Tascam USB US-122, US-224 and US-428 devices.
1912 This module supports multiple devices, autoprobe and hotplugging.
1914 Note: you need to load the firmware via usx2yloader utility included
1915 in alsa-tools and alsa-firmware packages.
1920 Module for AC'97 motherboards based on VIA 82C686A/686B, 8233,
1921 8233A, 8233C, 8235, 8237 (south) bridge.
1923 mpu_port - 0x300,0x310,0x320,0x330, otherwise obtain BIOS setup
1925 joystick - Enable joystick (default off) [VIA686A/686B only]
1926 ac97_clock - AC'97 codec clock base (default 48000Hz)
1927 dxs_support - support DXS channels,
1928 0 = auto (default), 1 = enable, 2 = disable,
1929 3 = 48k only, 4 = no VRA, 5 = enable any sample
1930 rate and different sample rates on different
1932 [VIA8233/C, 8235, 8237 only]
1933 ac97_quirk - AC'97 workaround for strange hardware
1934 See "AC97 Quirk Option" section below.
1936 This module supports one chip and autoprobe.
1938 Note: on some SMP motherboards like MSI 694D the interrupts might
1939 not be generated properly. In such a case, please try to
1940 set the SMP (or MPS) version on BIOS to 1.1 instead of
1941 default value 1.4. Then the interrupt number will be
1942 assigned under 15. You might also upgrade your BIOS.
1944 Note: VIA8233/5/7 (not VIA8233A) can support DXS (direct sound)
1945 channels as the first PCM. On these channels, up to 4
1946 streams can be played at the same time, and the controller
1947 can perform sample rate conversion with separate rates for
1949 As default (dxs_support = 0), 48k fixed rate is chosen
1950 except for the known devices since the output is often
1951 noisy except for 48k on some mother boards due to the
1953 Please try once dxs_support=5 and if it works on other
1954 sample rates (e.g. 44.1kHz of mp3 playback), please let us
1955 know the PCI subsystem vendor/device id's (output of
1957 If dxs_support=5 does not work, try dxs_support=4; if it
1958 doesn't work too, try dxs_support=1. (dxs_support=1 is
1959 usually for old motherboards. The correct implemented
1960 board should work with 4 or 5.) If it still doesn't
1961 work and the default setting is ok, dxs_support=3 is the
1962 right choice. If the default setting doesn't work at all,
1963 try dxs_support=2 to disable the DXS channels.
1964 In any cases, please let us know the result and the
1965 subsystem vendor/device ids. See "Links and Addresses"
1968 Note: for the MPU401 on VIA823x, use snd-mpu401 driver
1969 additionally. The mpu_port option is for VIA686 chips only.
1971 The power-management is supported.
1973 Module snd-via82xx-modem
1974 ------------------------
1976 Module for VIA82xx AC97 modem
1978 ac97_clock - AC'97 codec clock base (default 48000Hz)
1980 This module supports one card and autoprobe.
1982 Note: The default index value of this module is -2, i.e. the first
1985 The power-management is supported.
1990 Module for virtual rawmidi devices.
1991 This module creates virtual rawmidi devices which communicate
1992 to the corresponding ALSA sequencer ports.
1994 midi_devs - MIDI devices # (1-4, default=4)
1996 This module supports multiple cards.
2001 Module for Digigram VX-Pocket VX222, V222 v2 and Mic cards.
2003 mic - Enable Microphone on V222 Mic (NYI)
2004 ibl - Capture IBL size. (default = 0, minimum size)
2006 This module supports multiple cards.
2008 When the driver is compiled as a module and the hotplug firmware
2009 is supported, the firmware data is loaded via hotplug automatically.
2010 Install the necessary firmware files in alsa-firmware package.
2011 When no hotplug fw loader is available, you need to load the
2012 firmware via vxloader utility in alsa-tools package. To invoke
2013 vxloader automatically, add the following to /etc/modprobe.conf
2015 install snd-vx222 /sbin/modprobe --first-time -i snd-vx222 && /usr/bin/vxloader
2017 (for 2.2/2.4 kernels, add "post-install /usr/bin/vxloader" to
2018 /etc/modules.conf, instead.)
2019 IBL size defines the interrupts period for PCM. The smaller size
2020 gives smaller latency but leads to more CPU consumption, too.
2021 The size is usually aligned to 126. As default (=0), the smallest
2022 size is chosen. The possible IBL values can be found in
2023 /proc/asound/cardX/vx-status proc file.
2025 The power-management is supported.
2030 Module for Digigram VX-Pocket VX2 and 440 PCMCIA cards.
2032 ibl - Capture IBL size. (default = 0, minimum size)
2034 This module supports multiple cards. The module is compiled only when
2035 PCMCIA is supported on kernel.
2037 With the older 2.6.x kernel, to activate the driver via the card
2038 manager, you'll need to set up /etc/pcmcia/vxpocket.conf. See the
2039 sound/pcmcia/vx/vxpocket.c. 2.6.13 or later kernel requires no
2040 longer require a config file.
2042 When the driver is compiled as a module and the hotplug firmware
2043 is supported, the firmware data is loaded via hotplug automatically.
2044 Install the necessary firmware files in alsa-firmware package.
2045 When no hotplug fw loader is available, you need to load the
2046 firmware via vxloader utility in alsa-tools package.
2048 About capture IBL, see the description of snd-vx222 module.
2050 Note: snd-vxp440 driver is merged to snd-vxpocket driver since
2053 The power-management is supported.
2058 Module for Yamaha PCI chips (YMF72x, YMF74x & YMF75x).
2060 mpu_port - 0x300,0x330,0x332,0x334, 0 (disable) by default,
2061 1 (auto-detect for YMF744/754 only)
2062 fm_port - 0x388,0x398,0x3a0,0x3a8, 0 (disable) by default
2063 1 (auto-detect for YMF744/754 only)
2064 joystick_port - 0x201,0x202,0x204,0x205, 0 (disable) by default,
2066 rear_switch - enable shared rear/line-in switch (bool)
2068 This module supports autoprobe and multiple chips.
2070 The power-management is supported.
2072 Module snd-pdaudiocf
2073 --------------------
2075 Module for Sound Core PDAudioCF sound card.
2077 The power-management is supported.
2083 The ac97_quirk option is used to enable/override the workaround for
2084 specific devices on drivers for on-board AC'97 controllers like
2085 snd-intel8x0. Some hardware have swapped output pins between Master
2086 and Headphone, or Surround (thanks to confusion of AC'97
2087 specifications from version to version :-)
2089 The driver provides the auto-detection of known problematic devices,
2090 but some might be unknown or wrongly detected. In such a case, pass
2091 the proper value with this option.
2093 The following strings are accepted:
2094 - default Don't override the default setting
2095 - none Disable the quirk
2096 - hp_only Bind Master and Headphone controls as a single control
2097 - swap_hp Swap headphone and master controls
2098 - swap_surround Swap master and surround controls
2099 - ad_sharing For AD1985, turn on OMS bit and use headphone
2100 - alc_jack For ALC65x, turn on the jack sense mode
2101 - inv_eapd Inverted EAPD implementation
2102 - mute_led Bind EAPD bit for turning on/off mute LED
2104 For backward compatibility, the corresponding integer value -1, 0,
2105 ... are accepted, too.
2107 For example, if "Master" volume control has no effect on your device
2108 but only "Headphone" does, pass ac97_quirk=hp_only module option.
2111 Configuring Non-ISAPNP Cards
2112 ============================
2114 When the kernel is configured with ISA-PnP support, the modules
2115 supporting the isapnp cards will have module options "isapnp".
2116 If this option is set, *only* the ISA-PnP devices will be probed.
2117 For probing the non ISA-PnP cards, you have to pass "isapnp=0" option
2118 together with the proper i/o and irq configuration.
2120 When the kernel is configured without ISA-PnP support, isapnp option
2121 will be not built in.
2124 Module Autoloading Support
2125 ==========================
2127 The ALSA drivers can be loaded automatically on demand by defining
2128 module aliases. The string 'snd-card-%1' is requested for ALSA native
2129 devices where %i is sound card number from zero to seven.
2131 To auto-load an ALSA driver for OSS services, define the string
2132 'sound-slot-%i' where %i means the slot number for OSS, which
2133 corresponds to the card index of ALSA. Usually, define this
2134 as the same card module.
2136 An example configuration for a single emu10k1 card is like below:
2137 ----- /etc/modprobe.conf
2138 alias snd-card-0 snd-emu10k1
2139 alias sound-slot-0 snd-emu10k1
2140 ----- /etc/modprobe.conf
2142 The available number of auto-loaded sound cards depends on the module
2143 option "cards_limit" of snd module. As default it's set to 1.
2144 To enable the auto-loading of multiple cards, specify the number of
2145 sound cards in that option.
2147 When multiple cards are available, it'd better to specify the index
2148 number for each card via module option, too, so that the order of
2149 cards is kept consistent.
2151 An example configuration for two sound cards is like below:
2153 ----- /etc/modprobe.conf
2155 options snd cards_limit=2
2156 alias snd-card-0 snd-interwave
2157 alias snd-card-1 snd-ens1371
2158 options snd-interwave index=0
2159 options snd-ens1371 index=1
2161 alias sound-slot-0 snd-interwave
2162 alias sound-slot-1 snd-ens1371
2163 ----- /etc/modprobe.conf
2165 In this example, the interwave card is always loaded as the first card
2166 (index 0) and ens1371 as the second (index 1).
2168 Alternative (and new) way to fixate the slot assignment is to use
2169 "slots" option of snd module. In the case above, specify like the
2172 options snd slots=snd-interwave,snd-ens1371
2174 Then, the first slot (#0) is reserved for snd-interwave driver, and
2175 the second (#1) for snd-ens1371. You can omit index option in each
2176 driver if slots option is used (although you can still have them at
2177 the same time as long as they don't conflict).
2179 The slots option is especially useful for avoiding the possible
2180 hot-plugging and the resultant slot conflict. For example, in the
2181 case above again, the first two slots are already reserved. If any
2182 other driver (e.g. snd-usb-audio) is loaded before snd-interwave or
2183 snd-ens1371, it will be assigned to the third or later slot.
2186 ALSA PCM devices to OSS devices mapping
2187 =======================================
2189 /dev/snd/pcmC0D0[c|p] -> /dev/audio0 (/dev/audio) -> minor 4
2190 /dev/snd/pcmC0D0[c|p] -> /dev/dsp0 (/dev/dsp) -> minor 3
2191 /dev/snd/pcmC0D1[c|p] -> /dev/adsp0 (/dev/adsp) -> minor 12
2192 /dev/snd/pcmC1D0[c|p] -> /dev/audio1 -> minor 4+16 = 20
2193 /dev/snd/pcmC1D0[c|p] -> /dev/dsp1 -> minor 3+16 = 19
2194 /dev/snd/pcmC1D1[c|p] -> /dev/adsp1 -> minor 12+16 = 28
2195 /dev/snd/pcmC2D0[c|p] -> /dev/audio2 -> minor 4+32 = 36
2196 /dev/snd/pcmC2D0[c|p] -> /dev/dsp2 -> minor 3+32 = 39
2197 /dev/snd/pcmC2D1[c|p] -> /dev/adsp2 -> minor 12+32 = 44
2199 The first number from /dev/snd/pcmC{X}D{Y}[c|p] expression means
2200 sound card number and second means device number. The ALSA devices
2201 have either 'c' or 'p' suffix indicating the direction, capture and
2202 playback, respectively.
2204 Please note that the device mapping above may be varied via the module
2205 options of snd-pcm-oss module.
2208 Proc interfaces (/proc/asound)
2209 ==============================
2211 /proc/asound/card#/pcm#[cp]/oss
2212 -------------------------------
2213 String "erase" - erase all additional informations about OSS applications
2214 String "<app_name> <fragments> <fragment_size> [<options>]"
2216 <app_name> - name of application with (higher priority) or without path
2217 <fragments> - number of fragments or zero if auto
2218 <fragment_size> - size of fragment in bytes or zero if auto
2219 <options> - optional parameters
2220 - disable the application tries to open a pcm device for
2221 this channel but does not want to use it.
2222 (Cause a bug or mmap needs)
2223 It's good for Quake etc...
2224 - direct don't use plugins
2225 - block force block mode (rvplayer)
2226 - non-block force non-block mode
2227 - whole-frag write only whole fragments (optimization affecting
2229 - no-silence do not fill silence ahead to avoid clicks
2230 - buggy-ptr Returns the whitespace blocks in GETOPTR ioctl
2231 instead of filled blocks
2233 Example: echo "x11amp 128 16384" > /proc/asound/card0/pcm0p/oss
2234 echo "squake 0 0 disable" > /proc/asound/card0/pcm0c/oss
2235 echo "rvplayer 0 0 block" > /proc/asound/card0/pcm0p/oss
2238 Early Buffer Allocation
2239 =======================
2241 Some drivers (e.g. hdsp) require the large contiguous buffers, and
2242 sometimes it's too late to find such spaces when the driver module is
2243 actually loaded due to memory fragmentation. You can pre-allocate the
2244 PCM buffers by loading snd-page-alloc module and write commands to its
2245 proc file in prior, for example, in the early boot stage like
2246 /etc/init.d/*.local scripts.
2248 Reading the proc file /proc/drivers/snd-page-alloc shows the current
2249 usage of page allocation. In writing, you can send the following
2250 commands to the snd-page-alloc driver:
2252 - add VENDOR DEVICE MASK SIZE BUFFERS
2254 VENDOR and DEVICE are PCI vendor and device IDs. They take
2255 integer numbers (0x prefix is needed for the hex).
2256 MASK is the PCI DMA mask. Pass 0 if not restricted.
2257 SIZE is the size of each buffer to allocate. You can pass
2258 k and m suffix for KB and MB. The max number is 16MB.
2259 BUFFERS is the number of buffers to allocate. It must be greater
2260 than 0. The max number is 4.
2264 This will erase the all pre-allocated buffers which are not in
2271 ALSA project homepage
2272 http://www.alsa-project.org
2274 ALSA Bug Tracking System
2275 https://bugtrack.alsa-project.org/bugs/
2278 mailto:alsa-devel@alsa-project.org
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