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.
61 - permission mask for dynamic sound device filesystem
62 - This is available only when DEVFS is enabled
64 - E.g.: device_mode=0660
70 The PCM OSS emulation module.
71 This module takes options which change the mapping of devices.
73 dsp_map - PCM device number maps assigned to the 1st OSS device.
75 adsp_map - PCM device number maps assigned to the 2st OSS device.
78 - Don't block opening busy PCM devices.
80 For example, when dsp_map=2, /dev/dsp will be mapped to PCM #2 of
81 the card #0. Similarly, when adsp_map=0, /dev/adsp will be mapped
82 to PCM #0 of the card #0.
83 For changing the second or later card, specify the option with
84 commas, such like "dsp_map=0,1".
86 nonblock_open option is used to change the behavior of the PCM
87 regarding opening the device. When this option is non-zero,
88 opening a busy OSS PCM device won't be blocked but return
89 immediately with EAGAIN (just like O_NONBLOCK flag).
94 This module takes options which change the mapping of devices.
95 similar to those of the snd-pcm-oss module.
97 midi_map - MIDI device number maps assigned to the 1st OSS device.
99 amidi_map - MIDI device number maps assigned to the 2st OSS device.
102 Common parameters for top sound card modules
103 --------------------------------------------
105 Each of top level sound card module takes the following options.
107 index - index (slot #) of sound card
108 - Values: 0 through 7 or negative
109 - If nonnegative, assign that index number
110 - if negative, interpret as a bitmask of permissible
111 indices; the first free permitted index is assigned
113 id - card ID (identifier or name)
114 - Can be up to 15 characters long
115 - Default: the card type
116 - A directory by this name is created under /proc/asound/
117 containing information about the card
118 - This ID can be used instead of the index number in
121 - Default: enabled, for PCI and ISA PnP cards
126 Module for sound cards based on Analog Devices AD1816A/AD1815 ISA chips.
128 port - port # for AD1816A chip (PnP setup)
129 mpu_port - port # for MPU-401 UART (PnP setup)
130 fm_port - port # for OPL3 (PnP setup)
131 irq - IRQ # for AD1816A chip (PnP setup)
132 mpu_irq - IRQ # for MPU-401 UART (PnP setup)
133 dma1 - first DMA # for AD1816A chip (PnP setup)
134 dma2 - second DMA # for AD1816A chip (PnP setup)
135 clockfreq - Clock frequency for AD1816A chip (default = 0, 33000Hz)
137 Module supports up to 8 cards, autoprobe and PnP.
142 Module for sound cards based on AD1848/AD1847/CS4248 ISA chips.
144 port - port # for AD1848 chip
145 irq - IRQ # for AD1848 chip
146 dma1 - DMA # for AD1848 chip (0,1,3)
148 Module supports up to 8 cards. This module does not support autoprobe
149 thus main port must be specified!!! Other ports are optional.
154 Module for ALi M5451 PCI chip.
156 pcm_channels - Number of hardware channels assigned for PCM
157 spdif - Support SPDIF I/O
160 Module supports autoprobe and multiple chips (max 8).
162 The power-management is supported.
167 Module for sound cards based on Avance Logic ALS100/ALS120 ISA chips.
169 port - port # for ALS100 (SB16) chip (PnP setup)
170 irq - IRQ # for ALS100 (SB16) chip (PnP setup)
171 dma8 - 8-bit DMA # for ALS100 (SB16) chip (PnP setup)
172 dma16 - 16-bit DMA # for ALS100 (SB16) chip (PnP setup)
173 mpu_port - port # for MPU-401 UART (PnP setup)
174 mpu_irq - IRQ # for MPU-401 (PnP setup)
175 fm_port - port # for OPL3 FM (PnP setup)
177 Module supports up to 8 cards, autoprobe and PnP.
182 Module for sound cards based on Avance Logic ALS4000 PCI chip.
184 joystick_port - port # for legacy joystick support.
185 0 = disabled (default), 1 = auto-detect
187 Module supports up to 8 cards, autoprobe and PnP.
192 Module for ATI IXP 150/200/250 AC97 controllers.
194 ac97_clock - AC'97 clock (defalut = 48000)
195 ac97_quirk - AC'97 workaround for strange hardware
196 See the description of intel8x0 module for details.
197 spdif_aclink - S/PDIF transfer over AC-link (default = 1)
199 This module supports up to 8 cards and autoprobe.
201 Module snd-atiixp-modem
202 -----------------------
204 Module for ATI IXP 150/200/250 AC97 modem controllers.
206 Module supports up to 8 cards.
208 Note: The default index value of this module is -2, i.e. the first
211 Module snd-au8810, snd-au8820, snd-au8830
212 -----------------------------------------
214 Module for Aureal Vortex, Vortex2 and Advantage device.
216 pcifix - Control PCI workarounds
217 0 = Disable all workarounds
218 1 = Force the PCI latency of the Aureal card to 0xff
219 2 = Force the Extend PCI#2 Internal Master for Efficient
220 Handling of Dummy Requests on the VIA KT133 AGP Bridge
221 3 = Force both settings
222 255 = Autodetect what is required (default)
224 This module supports all ADB PCM channels, ac97 mixer, SPDIF, hardware
225 EQ, mpu401, gameport. A3D and wavetable support are still in development.
226 Development and reverse engineering work is being coordinated at
227 http://savannah.nongnu.org/projects/openvortex/
228 SPDIF output has a copy of the AC97 codec output, unless you use the
229 "spdif" pcm device, which allows raw data passthru.
230 The hardware EQ hardware and SPDIF is only present in the Vortex2 and
233 Note: Some ALSA mixer applicactions don't handle the SPDIF samplerate
234 control correctly. If you have problems regarding this, try
235 another ALSA compliant mixer (alsamixer works).
240 Module for sound cards based on Aztech System AZT2320 ISA chip (PnP only).
242 port - port # for AZT2320 chip (PnP setup)
243 wss_port - port # for WSS (PnP setup)
244 mpu_port - port # for MPU-401 UART (PnP setup)
245 fm_port - FM port # for AZT2320 chip (PnP setup)
246 irq - IRQ # for AZT2320 (WSS) chip (PnP setup)
247 mpu_irq - IRQ # for MPU-401 UART (PnP setup)
248 dma1 - 1st DMA # for AZT2320 (WSS) chip (PnP setup)
249 dma2 - 2nd DMA # for AZT2320 (WSS) chip (PnP setup)
251 Module supports up to 8 cards, PnP and autoprobe.
256 Module for sound cards based on Aztech AZF3328 PCI chip.
258 joystick - Enable joystick (default off)
260 Module supports up to 8 cards.
265 Module for video cards based on Bt87x chips.
267 digital_rate - Override the default digital rate (Hz)
268 load_all - Load the driver even if the card model isn't known
270 Module supports up to 8 cards.
272 Note: The default index value of this module is -2, i.e. the first
278 Module for Creative Audigy LS and SB Live 24bit
280 Module supports up to 8 cards.
286 Module for sound cards based on C-Media CMI8330 ISA chips.
288 wssport - port # for CMI8330 chip (WSS)
289 wssirq - IRQ # for CMI8330 chip (WSS)
290 wssdma - first DMA # for CMI8330 chip (WSS)
291 sbport - port # for CMI8330 chip (SB16)
292 sbirq - IRQ # for CMI8330 chip (SB16)
293 sbdma8 - 8bit DMA # for CMI8330 chip (SB16)
294 sbdma16 - 16bit DMA # for CMI8330 chip (SB16)
296 Module supports up to 8 cards and autoprobe.
301 Module for C-Media CMI8338 and 8738 PCI sound cards.
303 mpu_port - 0x300,0x310,0x320,0x330, 0 = disable (default)
304 fm_port - 0x388 (default), 0 = disable (default)
305 soft_ac3 - Sofware-conversion of raw SPDIF packets (model 033 only)
307 joystick_port - Joystick port address (0 = disable, 1 = auto-detect)
309 Module supports autoprobe and multiple chips (max 8).
314 Module for sound cards based on CS4231 ISA chips.
316 port - port # for CS4231 chip
317 mpu_port - port # for MPU-401 UART (optional), -1 = disable
318 irq - IRQ # for CS4231 chip
319 mpu_irq - IRQ # for MPU-401 UART
320 dma1 - first DMA # for CS4231 chip
321 dma2 - second DMA # for CS4231 chip
323 Module supports up to 8 cards. This module does not support autoprobe
324 thus main port must be specified!!! Other ports are optional.
326 The power-management is supported.
331 Module for sound cards based on CS4232/CS4232A ISA chips.
333 port - port # for CS4232 chip (PnP setup - 0x534)
334 cport - control port # for CS4232 chip (PnP setup - 0x120,0x210,0xf00)
335 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
336 fm_port - FM port # for CS4232 chip (PnP setup - 0x388), -1 = disable
337 irq - IRQ # for CS4232 chip (5,7,9,11,12,15)
338 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
339 dma1 - first DMA # for CS4232 chip (0,1,3)
340 dma2 - second DMA # for Yamaha CS4232 chip (0,1,3), -1 = disable
341 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
343 Module supports up to 8 cards. This module does not support autoprobe
344 thus main port must be specified!!! Other ports are optional.
346 The power-management is supported.
351 Module for sound cards based on CS4235/CS4236/CS4236B/CS4237B/
352 CS4238B/CS4239 ISA chips.
354 port - port # for CS4236 chip (PnP setup - 0x534)
355 cport - control port # for CS4236 chip (PnP setup - 0x120,0x210,0xf00)
356 mpu_port - port # for MPU-401 UART (PnP setup - 0x300), -1 = disable
357 fm_port - FM port # for CS4236 chip (PnP setup - 0x388), -1 = disable
358 irq - IRQ # for CS4236 chip (5,7,9,11,12,15)
359 mpu_irq - IRQ # for MPU-401 UART (9,11,12,15)
360 dma1 - first DMA # for CS4236 chip (0,1,3)
361 dma2 - second DMA # for CS4236 chip (0,1,3), -1 = disable
362 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
364 Module supports up to 8 cards. This module does not support autoprobe
365 (if ISA PnP is not used) thus main port and control port must be
366 specified!!! Other ports are optional.
368 The power-management is supported.
373 Module for Cirrus Logic CS4281 soundchip.
375 dual_codec - Secondary codec ID (0 = disable, default)
377 Module supports up to 8 cards.
379 The power-management is supported.
384 Module for PCI sound cards based on CS4610/CS4612/CS4614/CS4615/CS4622/
385 CS4624/CS4630/CS4280 PCI chips.
387 external_amp - Force to enable external amplifer.
388 thinkpad - Force to enable Thinkpad's CLKRUN control.
389 mmap_valid - Support OSS mmap mode (default = 0).
391 Module supports up to 8 cards and autoprobe.
392 Usually external amp and CLKRUN controls are detected automatically
393 from PCI sub vendor/device ids. If they don't work, give the options
396 The power-management is supported.
401 Module for Diamond Technologies DT-019X / Avance Logic ALS-007 (PnP
404 port - Port # (PnP setup)
405 mpu_port - Port # for MPU-401 (PnP setup)
406 fm_port - Port # for FM OPL-3 (PnP setup)
407 irq - IRQ # (PnP setup)
408 mpu_irq - IRQ # for MPU-401 (PnP setup)
409 dma8 - DMA # (PnP setup)
411 Module supports up to 8 cards. This module is enabled only with
417 Module for the dummy sound card. This "card" doesn't do any output
418 or input, but you may use this module for any application which
419 requires a sound card (like RealPlayer).
424 Module for EMU10K1/EMU10k2 based PCI sound cards.
425 * Sound Blaster Live!
426 * Sound Blaster PCI 512
427 * Emu APS (partially supported)
428 * Sound Blaster Audigy
430 extin - bitmap of available external inputs for FX8010 (see bellow)
431 extout - bitmap of available external outputs for FX8010 (see bellow)
432 seq_ports - allocated sequencer ports (4 by default)
433 max_synth_voices - limit of voices used for wavetable (64 by default)
434 max_buffer_size - specifies the maximum size of wavetable/pcm buffers
435 given in MB unit. Default value is 128.
436 enable_ir - enable IR
438 Module supports up to 8 cards and autoprobe.
440 Input & Output configurations [extin/extout]
441 * Creative Card wo/Digital out [0x0003/0x1f03]
442 * Creative Card w/Digital out [0x0003/0x1f0f]
443 * Creative Card w/Digital CD in [0x000f/0x1f0f]
444 * Creative Card wo/Digital out + LiveDrive [0x3fc3/0x1fc3]
445 * Creative Card w/Digital out + LiveDrive [0x3fc3/0x1fcf]
446 * Creative Card w/Digital CD in + LiveDrive [0x3fcf/0x1fcf]
447 * Creative Card wo/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
448 * Creative Card w/Digital out + Digital I/O 2 [0x0fc3/0x1f0f]
449 * Creative Card w/Digital CD in + Digital I/O 2 [0x0fcf/0x1f0f]
450 * Creative Card 5.1/w Digital out + LiveDrive [0x3fc3/0x1fff]
451 * Creative Card 5.1 (c) 2003 [0x3fc3/0x7cff]
452 * Creative Card all ins and outs [0x3fff/0x7fff]
457 Module for Creative Emu10k1X (SB Live Dell OEM version)
459 Module supports up to 8 cards.
464 Module for Ensoniq AudioPCI ES1370 PCI sound cards.
465 * SoundBlaster PCI 64
466 * SoundBlaster PCI 128
468 joystick - Enable joystick (default off)
470 Module supports up to 8 cards and autoprobe.
475 Module for Ensoniq AudioPCI ES1371 PCI sound cards.
476 * SoundBlaster PCI 64
477 * SoundBlaster PCI 128
478 * SoundBlaster Vibra PCI
480 joystick_port - port # for joystick (0x200,0x208,0x210,0x218),
481 0 = disable (default), 1 = auto-detect
483 Module supports up to 8 cards and autoprobe.
488 Module for sound cards based on ESS ES968 chip (PnP only).
490 port - port # for ES968 (SB8) chip (PnP setup)
491 irq - IRQ # for ES968 (SB8) chip (PnP setup)
492 dma1 - DMA # for ES968 (SB8) chip (PnP setup)
494 Module supports up to 8 cards, PnP and autoprobe.
499 Module for ESS AudioDrive ES-1688 and ES-688 sound cards.
501 port - port # for ES-1688 chip (0x220,0x240,0x260)
502 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
503 irq - IRQ # for ES-1688 chip (5,7,9,10)
504 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
505 dma8 - DMA # for ES-1688 chip (0,1,3)
507 Module supports up to 8 cards and autoprobe (without MPU-401 port).
512 Module for ESS AudioDrive ES-18xx sound cards.
514 port - port # for ES-18xx chip (0x220,0x240,0x260)
515 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable (default)
516 fm_port - port # for FM (optional, not used)
517 irq - IRQ # for ES-18xx chip (5,7,9,10)
518 dma1 - first DMA # for ES-18xx chip (0,1,3)
519 dma2 - first DMA # for ES-18xx chip (0,1,3)
520 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
522 Module supports up to 8 cards ISA PnP and autoprobe (without MPU-401 port
523 if native ISA PnP routines are not used).
524 When dma2 is equal with dma1, the driver works as half-duplex.
526 The power-management is supported.
531 Module for sound cards based on ESS Solo-1 (ES1938,ES1946) chips.
533 Module supports up to 8 cards and autoprobe.
538 Module for sound cards based on ESS Maestro-1/2/2E (ES1968/ES1978) chips.
540 total_bufsize - total buffer size in kB (1-4096kB)
541 pcm_substreams_p - playback channels (1-8, default=2)
542 pcm_substreams_c - capture channels (1-8, default=0)
543 clock - clock (0 = auto-detection)
544 use_pm - support the power-management (0 = off, 1 = on,
546 enable_mpu - enable MPU401 (0 = off, 1 = on, 2 = auto (default))
547 joystick - enable joystick (default off)
549 Module supports up to 8 cards and autoprobe.
551 The power-management is supported.
556 Module for ForteMedia FM801 based PCI sound cards.
558 tea575x_tuner - Enable TEA575x tuner
559 - 1 = MediaForte 256-PCS
560 - 2 = MediaForte 256-PCPR
561 - 3 = MediaForte 64-PCR
562 - High 16-bits are video (radio) device number + 1
563 - example: 0x10002 (MediaForte 256-PCPR, device 1)
565 Module supports up to 8 cards and autoprobe.
567 Module snd-gusclassic
568 ---------------------
570 Module for Gravis UltraSound Classic sound card.
572 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
573 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
574 dma1 - DMA # for GF1 chip (1,3,5,6,7)
575 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
576 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
577 voices - GF1 voices limit (14-32)
578 pcm_voices - reserved PCM voices
580 Module supports up to 8 cards and autoprobe.
582 Module snd-gusextreme
583 ---------------------
585 Module for Gravis UltraSound Extreme (Synergy ViperMax) sound card.
587 port - port # for ES-1688 chip (0x220,0x230,0x240,0x250,0x260)
588 gf1_port - port # for GF1 chip (0x210,0x220,0x230,0x240,0x250,0x260,0x270)
589 mpu_port - port # for MPU-401 port (0x300,0x310,0x320,0x330), -1 = disable
590 irq - IRQ # for ES-1688 chip (5,7,9,10)
591 gf1_irq - IRQ # for GF1 chip (3,5,9,11,12,15)
592 mpu_irq - IRQ # for MPU-401 port (5,7,9,10)
593 dma8 - DMA # for ES-1688 chip (0,1,3)
594 dma1 - DMA # for GF1 chip (1,3,5,6,7)
595 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
596 voices - GF1 voices limit (14-32)
597 pcm_voices - reserved PCM voices
599 Module supports up to 8 cards and autoprobe (without MPU-401 port).
604 Module for Gravis UltraSound MAX sound card.
606 port - port # for GF1 chip (0x220,0x230,0x240,0x250,0x260)
607 irq - IRQ # for GF1 chip (3,5,9,11,12,15)
608 dma1 - DMA # for GF1 chip (1,3,5,6,7)
609 dma2 - DMA # for GF1 chip (1,3,5,6,7,-1=disable)
610 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
611 voices - GF1 voices limit (14-32)
612 pcm_voices - reserved PCM voices
614 Module supports up to 8 cards and autoprobe.
619 Module for Intel HD Audio (ICH6, ICH6M, ICH7), ATI SB450,
622 model - force the model name
623 position_fix - Fix DMA pointer (0 = FIFO size, 1 = none, 2 = POSBUF)
625 Module supports up to 8 cards.
627 Each codec may have a model table for different configurations.
628 If your machine isn't listed there, the default (usually minimal)
629 configuration is set up. You can pass "model=<name>" option to
630 specify a certain model in such a case. There are different
631 models depending on the codec chip.
633 Model name Description
634 ---------- -----------
636 3stack 3-jack in back and a headphone out
637 3stack-digout 3-jack in back, a HP out and a SPDIF out
638 5stack 5-jack in back, 2-jack in front
639 5stack-digout 5-jack in back, 2-jack in front, a SPDIF out
640 6stack 6-jack in back, 2-jack in front
641 6stack-digout 6-jack with a SPDIF out
643 z71v 3-jack (HP shared SPDIF)
647 test for testing/debugging purpose, almost all controls can be
648 adjusted. Appearing only when compiled with
652 minimal 3-jack in back
653 min_fp 3-jack in back, 2-jack in front
654 full 6-jack in back, 2-jack in front
655 full_dig 6-jack in back, 2-jack in front, SPDIF I/O
656 allout 5-jack in back, 2-jack in front, SPDIF out
657 auto auto-config reading BIOS (default)
659 Note 2: If you get click noises on output, try the module option
660 position_fix=1 or 2. position_fix=1 will use the SD_LPIB
661 register value without FIFO size correction as the current
662 DMA pointer. position_fix=2 will make the driver to use
663 the position buffer instead of reading SD_LPIB register.
664 (Usually SD_LPLIB register is more accurate than the
670 Module for RME Hammerfall DSP audio interface(s)
672 Module supports up to 8 cards.
674 Note: The firmware data can be automatically loaded via hotplug
675 when CONFIG_FW_LOADER is set. Otherwise, you need to load
676 the firmware via hdsploader utility included in alsa-tools
678 The firmware data is found in alsa-firmware package.
680 Note: snd-page-alloc module does the job which snd-hammerfall-mem
681 module did formerly. It will allocate the buffers in advance
682 when any HDSP cards are found. To make the buffer
683 allocation sure, load snd-page-alloc module in the early
684 stage of boot sequence. See "Early Buffer Allocation"
690 Module for RME HDSP MADI board.
692 precise_ptr - Enable precise pointer, or disable.
693 line_outs_monitor - Send playback streams to analog outs by default.
694 enable_monitor - Enable Analog Out on Channel 63/64 by default.
696 See hdspm.txt for details.
701 Module for Envy24 (ICE1712) based PCI sound cards.
702 * MidiMan M Audio Delta 1010
703 * MidiMan M Audio Delta 1010LT
704 * MidiMan M Audio Delta DiO 2496
705 * MidiMan M Audio Delta 66
706 * MidiMan M Audio Delta 44
707 * MidiMan M Audio Delta 410
708 * MidiMan M Audio Audiophile 2496
714 * Hoontech SoundTrack DSP 24
715 * Hoontech SoundTrack DSP 24 Value
716 * Hoontech SoundTrack DSP 24 Media 7.1
717 * Event Electronics, EZ8
719 * Lionstracs, Mediastaton
721 model - Use the given board model, one of the following:
722 delta1010, dio2496, delta66, delta44, audiophile, delta410,
723 delta1010lt, vx442, ewx2496, ews88mt, ews88mt_new, ews88d,
724 dmx6fire, dsp24, dsp24_value, dsp24_71, ez8,
725 phase88, mediastation
726 omni - Omni I/O support for MidiMan M-Audio Delta44/66
727 cs8427_timeout - reset timeout for the CS8427 chip (S/PDIF transciever)
728 in msec resolution, default value is 500 (0.5 sec)
730 Module supports up to 8 cards and autoprobe. Note: The consumer part
731 is not used with all Envy24 based cards (for example in the MidiMan Delta
734 Note: The supported board is detected by reading EEPROM or PCI
735 SSID (if EEPROM isn't available). You can override the
736 model by passing "model" module option in case that the
737 driver isn't configured properly or you want to try another
743 Module for Envy24HT (VT/ICE1724), Envy24PT (VT1720) based PCI sound cards.
744 * MidiMan M Audio Revolution 7.1
746 * TerraTec Aureon 5.1 Sky
747 * TerraTec Aureon 7.1 Space
748 * TerraTec Aureon 7.1 Universe
751 * AudioTrak Prodigy 7.1
752 * AudioTrak Prodigy 192
754 * Albatron K8X800 Pro II
761 model - Use the given board model, one of the following:
762 revo71, amp2000, prodigy71, prodigy192, aureon51,
763 aureon71, universe, k8x800, phase22, phase28, ms300,
766 Module supports up to 8 cards and autoprobe.
768 Note: The supported board is detected by reading EEPROM or PCI
769 SSID (if EEPROM isn't available). You can override the
770 model by passing "model" module option in case that the
771 driver isn't configured properly or you want to try another
777 Module for AC'97 motherboards from Intel and compatibles.
778 * Intel i810/810E, i815, i820, i830, i84x, MX440
780 * NVidia NForce, NForce2
781 * AMD AMD768, AMD8111
784 ac97_clock - AC'97 codec clock base (0 = auto-detect)
785 ac97_quirk - AC'97 workaround for strange hardware
786 The following strings are accepted:
787 default = don't override the default setting
788 disable = disable the quirk
789 hp_only = use headphone control as master
790 swap_hp = swap headphone and master controls
791 swap_surround = swap master and surround controls
792 ad_sharing = for AD1985, turn on OMS bit and use headphone
793 alc_jack = for ALC65x, turn on the jack sense mode
794 inv_eapd = inverted EAPD implementation
795 mute_led = bind EAPD bit for turning on/off mute LED
796 For backward compatibility, the corresponding integer
797 value -1, 0, ... are accepted, too.
798 buggy_irq - Enable workaround for buggy interrupts on some
799 motherboards (default off)
801 Module supports autoprobe and multiple bus-master chips (max 8).
803 Note: the latest driver supports auto-detection of chip clock.
804 if you still encounter too fast playback, specify the clock
805 explicitly via the module option "ac97_clock=41194".
807 Joystick/MIDI ports are not supported by this driver. If your
808 motherboard has these devices, use the ns558 or snd-mpu401
809 modules, respectively.
811 The ac97_quirk option is used to enable/override the workaround
812 for specific devices. Some hardware have swapped output pins
813 between Master and Headphone, or Surround. The driver provides
814 the auto-detection of known problematic devices, but some might
815 be unknown or wrongly detected. In such a case, pass the proper
816 value with this option.
818 The power-management is supported.
823 Module for Intel ICH (i8x0) chipset MC97 modems.
825 ac97_clock - AC'97 codec clock base (0 = auto-detect)
827 This module supports up to 8 cards and autoprobe.
829 Note: The default index value of this module is -2, i.e. the first
835 Module for Gravis UltraSound PnP, Dynasonic 3-D/Pro, STB Sound Rage 32
836 and other sound cards based on AMD InterWave (tm) chip.
838 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
839 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
840 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
841 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
842 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
843 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
844 pcm_voices - reserved PCM voices for the synthesizer (default 2)
845 effect - 1 = InterWave effects enable (default 0);
848 Module supports up to 8 cards, autoprobe and ISA PnP.
850 Module snd-interwave-stb
851 ------------------------
853 Module for UltraSound 32-Pro (sound card from STB used by Compaq)
854 and other sound cards based on AMD InterWave (tm) chip with TEA6330T
855 circuit for extended control of bass, treble and master volume.
857 port - port # for InterWave chip (0x210,0x220,0x230,0x240,0x250,0x260)
858 port_tc - tone control (i2c bus) port # for TEA6330T chip (0x350,0x360,0x370,0x380)
859 irq - IRQ # for InterWave chip (3,5,9,11,12,15)
860 dma1 - DMA # for InterWave chip (0,1,3,5,6,7)
861 dma2 - DMA # for InterWave chip (0,1,3,5,6,7,-1=disable)
862 joystick_dac - 0 to 31, (0.59V-4.52V or 0.389V-2.98V)
863 midi - 1 = MIDI UART enable, 0 = MIDI UART disable (default)
864 pcm_voices - reserved PCM voices for the synthesizer (default 2)
865 effect - 1 = InterWave effects enable (default 0);
868 Module supports up to 8 cards, autoprobe and ISA PnP.
873 Module for Korg 1212 IO PCI card
875 Module supports up to 8 cards.
880 Module for Allegro/Maestro3 chips
882 external_amp - enable external amp (enabled by default)
883 amp_gpio - GPIO pin number for external amp (0-15) or
884 -1 for default pin (8 for allegro, 1 for
887 Module supports autoprobe and multiple chips (max 8).
889 Note: the binding of amplifier is dependent on hardware.
890 If there is no sound even though all channels are unmuted, try to
891 specify other gpio connection via amp_gpio option.
892 For example, a Panasonic notebook might need "amp_gpio=0x0d"
895 The power-management is supported.
900 Module for Digigram miXart8 sound cards.
902 Module supports multiple cards.
903 Note: One miXart8 board will be represented as 4 alsa cards.
904 See MIXART.txt for details.
906 When the driver is compiled as a module and the hotplug firmware
907 is supported, the firmware data is loaded via hotplug automatically.
908 Install the necessary firmware files in alsa-firmware package.
909 When no hotplug fw loader is available, you need to load the
910 firmware via mixartloader utility in alsa-tools package.
915 Module for MPU-401 UART devices.
917 port - port number or -1 (disable)
918 irq - IRQ number or -1 (disable)
919 pnp - PnP detection - 0 = disable, 1 = enable (default)
921 Module supports multiple devices (max 8) and PnP.
926 Module for MOTU MidiTimePiece AV multiport MIDI (on the parallel
929 port - I/O port # for MTPAV (0x378,0x278, default=0x378)
930 irq - IRQ # for MTPAV (7,5, default=7)
931 hwports - number of supported hardware ports, default=8.
933 Module supports only 1 card. This module has no enable option.
938 Module for NeoMagic NM256AV/ZX chips
940 playback_bufsize - max playback frame size in kB (4-128kB)
941 capture_bufsize - max capture frame size in kB (4-128kB)
942 force_ac97 - 0 or 1 (disabled by default)
943 buffer_top - specify buffer top address
944 use_cache - 0 or 1 (disabled by default)
945 vaio_hack - alias buffer_top=0x25a800
946 reset_workaround - enable AC97 RESET workaround for some laptops
948 Module supports autoprobe and multiple chips (max 8).
950 The power-management is supported.
952 Note: on some notebooks the buffer address cannot be detected
953 automatically, or causes hang-up during initialization.
954 In such a case, specify the buffer top address explicity via
957 Sony F250: buffer_top=0x25a800
958 Sony F270: buffer_top=0x272800
959 The driver supports only ac97 codec. It's possible to force
960 to initialize/use ac97 although it's not detected. In such a
961 case, use force_ac97=1 option - but *NO* guarantee whether it
964 Note: The NM256 chip can be linked internally with non-AC97
965 codecs. This driver supports only the AC97 codec, and won't work
966 with machines with other (most likely CS423x or OPL3SAx) chips,
967 even though the device is detected in lspci. In such a case, try
968 other drivers, e.g. snd-cs4232 or snd-opl3sa2. Some has ISA-PnP
969 but some doesn't have ISA PnP. You'll need to speicfy isapnp=0
970 and proper hardware parameters in the case without ISA PnP.
972 Note: some laptops need a workaround for AC97 RESET. For the
973 known hardware like Dell Latitude LS and Sony PCG-F305, this
974 workaround is enabled automatically. For other laptops with a
975 hard freeze, you can try reset_workaround=1 option.
977 Note: This driver is really crappy. It's a porting from the
978 OSS driver, which is a result of black-magic reverse engineering.
979 The detection of codec will fail if the driver is loaded *after*
980 X-server as described above. You might be able to force to load
981 the module, but it may result in hang-up. Hence, make sure that
982 you load this module *before* X if you encounter this kind of
988 Module for Yamaha OPL3-SA2/SA3 sound cards.
990 port - control port # for OPL3-SA chip (0x370)
991 sb_port - SB port # for OPL3-SA chip (0x220,0x240)
992 wss_port - WSS port # for OPL3-SA chip (0x530,0xe80,0xf40,0x604)
993 midi_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
994 fm_port - FM port # for OPL3-SA chip (0x388), -1 = disable
995 irq - IRQ # for OPL3-SA chip (5,7,9,10)
996 dma1 - first DMA # for Yamaha OPL3-SA chip (0,1,3)
997 dma2 - second DMA # for Yamaha OPL3-SA chip (0,1,3), -1 = disable
998 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1000 Module supports up to 8 cards and ISA PnP. This module does not support
1001 autoprobe (if ISA PnP is not used) thus all ports must be specified!!!
1003 The power-management is supported.
1005 Module snd-opti92x-ad1848
1006 -------------------------
1008 Module for sound cards based on OPTi 82c92x and Analog Devices AD1848 chips.
1009 Module works with OAK Mozart cards as well.
1011 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1012 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1013 fm_port - port # for OPL3 device (0x388)
1014 irq - IRQ # for WSS chip (5,7,9,10,11)
1015 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1016 dma1 - first DMA # for WSS chip (0,1,3)
1018 This module supports only one card, autoprobe and PnP.
1020 Module snd-opti92x-cs4231
1021 -------------------------
1023 Module for sound cards based on OPTi 82c92x and Crystal CS4231 chips.
1025 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1026 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1027 fm_port - port # for OPL3 device (0x388)
1028 irq - IRQ # for WSS chip (5,7,9,10,11)
1029 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1030 dma1 - first DMA # for WSS chip (0,1,3)
1031 dma2 - second DMA # for WSS chip (0,1,3)
1033 This module supports only one card, autoprobe and PnP.
1038 Module for sound cards based on OPTi 82c93x chips.
1040 port - port # for WSS chip (0x530,0xe80,0xf40,0x604)
1041 mpu_port - port # for MPU-401 UART (0x300,0x310,0x320,0x330)
1042 fm_port - port # for OPL3 device (0x388)
1043 irq - IRQ # for WSS chip (5,7,9,10,11)
1044 mpu_irq - IRQ # for MPU-401 UART (5,7,9,10)
1045 dma1 - first DMA # for WSS chip (0,1,3)
1046 dma2 - second DMA # for WSS chip (0,1,3)
1048 This module supports only one card, autoprobe and PnP.
1050 Module snd-powermac (on ppc only)
1051 ---------------------------------
1053 Module for PowerMac, iMac and iBook on-board soundchips
1055 enable_beep - enable beep using PCM (enabled as default)
1057 Module supports autoprobe a chip.
1059 Note: the driver may have problems regarding endianess.
1061 The power-management is supported.
1063 Module snd-pxa2xx-ac97 (on arm only)
1064 ------------------------------------
1066 Module for AC97 driver for the Intel PXA2xx chip
1068 For ARM architecture only.
1073 Module for RME Digi32, Digi32 Pro and Digi32/8 (Sek'd Prodif32,
1074 Prodif96 and Prodif Gold) sound cards.
1076 Module supports up to 8 cards.
1081 Module for RME Digi96, Digi96/8 and Digi96/8 PRO/PAD/PST sound cards.
1083 Module supports up to 8 cards.
1088 Module for RME Digi9652 (Hammerfall, Hammerfall-Light) sound cards.
1090 precise_ptr - Enable precise pointer (doesn't work reliably).
1093 Module supports up to 8 cards.
1095 Note: snd-page-alloc module does the job which snd-hammerfall-mem
1096 module did formerly. It will allocate the buffers in advance
1097 when any RME9652 cards are found. To make the buffer
1098 allocation sure, load snd-page-alloc module in the early
1099 stage of boot sequence. See "Early Buffer Allocation"
1102 Module snd-sa11xx-uda1341 (on arm only)
1103 ---------------------------------------
1105 Module for Philips UDA1341TS on Compaq iPAQ H3600 sound card.
1107 Module supports only one card.
1108 Module has no enable and index options.
1113 Module for 8-bit SoundBlaster cards: SoundBlaster 1.0,
1117 port - port # for SB DSP chip (0x220,0x240,0x260)
1118 irq - IRQ # for SB DSP chip (5,7,9,10)
1119 dma8 - DMA # for SB DSP chip (1,3)
1121 Module supports up to 8 cards and autoprobe.
1123 Module snd-sb16 and snd-sbawe
1124 -----------------------------
1126 Module for 16-bit SoundBlaster cards: SoundBlaster 16 (PnP),
1127 SoundBlaster AWE 32 (PnP),
1128 SoundBlaster AWE 64 PnP
1130 port - port # for SB DSP 4.x chip (0x220,0x240,0x260)
1131 mpu_port - port # for MPU-401 UART (0x300,0x330), -1 = disable
1132 awe_port - base port # for EMU8000 synthesizer (0x620,0x640,0x660)
1133 (snd-sbawe module only)
1134 irq - IRQ # for SB DSP 4.x chip (5,7,9,10)
1135 dma8 - 8-bit DMA # for SB DSP 4.x chip (0,1,3)
1136 dma16 - 16-bit DMA # for SB DSP 4.x chip (5,6,7)
1137 mic_agc - Mic Auto-Gain-Control - 0 = disable, 1 = enable (default)
1138 csp - ASP/CSP chip support - 0 = disable (default), 1 = enable
1139 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1141 Module supports up to 8 cards, autoprobe and ISA PnP.
1143 Note: To use Vibra16X cards in 16-bit half duplex mode, you must
1144 disable 16bit DMA with dma16 = -1 module parameter.
1145 Also, all Sound Blaster 16 type cards can operate in 16-bit
1146 half duplex mode through 8-bit DMA channel by disabling their
1152 Module for Aztech Sound Galaxy sound card.
1154 sbport - Port # for SB16 interface (0x220,0x240)
1155 wssport - Port # for WSS interface (0x530,0xe80,0xf40,0x604)
1156 irq - IRQ # (7,9,10,11)
1159 Module supports up to 8 cards.
1164 Module for ENSONIQ SoundScape PnP cards.
1166 port - Port # (PnP setup)
1167 irq - IRQ # (PnP setup)
1168 mpu_irq - MPU-401 IRQ # (PnP setup)
1169 dma - DMA # (PnP setup)
1171 Module supports up to 8 cards. ISA PnP must be enabled.
1172 You need sscape_ctl tool in alsa-tools package for loading
1175 Module snd-sun-amd7930 (on sparc only)
1176 --------------------------------------
1178 Module for AMD7930 sound chips found on Sparcs.
1180 Module supports up to 8 cards.
1182 Module snd-sun-cs4231 (on sparc only)
1183 -------------------------------------
1185 Module for CS4231 sound chips found on Sparcs.
1187 Module supports up to 8 cards.
1189 Module snd-sun-dbri (on sparc only)
1190 -----------------------------------
1192 Module for DBRI sound chips found on Sparcs.
1194 Module supports up to 8 cards.
1196 Module snd-wavefront
1197 --------------------
1199 Module for Turtle Beach Maui, Tropez and Tropez+ sound cards.
1201 cs4232_pcm_port - Port # for CS4232 PCM interface.
1202 cs4232_pcm_irq - IRQ # for CS4232 PCM interface (5,7,9,11,12,15).
1203 cs4232_mpu_port - Port # for CS4232 MPU-401 interface.
1204 cs4232_mpu_irq - IRQ # for CS4232 MPU-401 interface (9,11,12,15).
1205 use_cs4232_midi - Use CS4232 MPU-401 interface
1206 (inaccessibly located inside your computer)
1207 ics2115_port - Port # for ICS2115
1208 ics2115_irq - IRQ # for ICS2115
1209 fm_port - FM OPL-3 Port #
1210 dma1 - DMA1 # for CS4232 PCM interface.
1211 dma2 - DMA2 # for CS4232 PCM interface.
1212 isapnp - ISA PnP detection - 0 = disable, 1 = enable (default)
1214 Module supports up to 8 cards and ISA PnP.
1216 Module snd-sonicvibes
1217 ---------------------
1219 Module for S3 SonicVibes PCI sound cards.
1220 * PINE Schubert 32 PCI
1222 reverb - Reverb Enable - 1 = enable, 0 = disable (default)
1223 - SoundCard must have onboard SRAM for this.
1224 mge - Mic Gain Enable - 1 = enable, 0 = disable (default)
1226 Module supports up to 8 cards and autoprobe.
1228 Module snd-serial-u16550
1229 ------------------------
1231 Module for UART16550A serial MIDI ports.
1233 port - port # for UART16550A chip
1234 irq - IRQ # for UART16550A chip, -1 = poll mode
1235 speed - speed in bauds (9600,19200,38400,57600,115200)
1237 base - base for divisor in bauds (57600,115200,230400,460800)
1239 outs - number of MIDI ports in a serial port (1-4)
1241 adaptor - Type of adaptor.
1242 0 = Soundcanvas, 1 = MS-124T, 2 = MS-124W S/A,
1243 3 = MS-124W M/B, 4 = Generic
1245 Module supports up to 8 cards. This module does not support autoprobe
1246 thus the main port must be specified!!! Other options are optional.
1251 Module for Trident 4DWave DX/NX sound cards.
1252 * Best Union Miss Melody 4DWave PCI
1254 * Warpspeed ONSpeed 4DWave PCI
1257 * CHIC True Sound 4Dwave
1258 * Shark Predator4D-PCI
1259 * Jaton SonicWave 4D
1261 pcm_channels - max channels (voices) reserved for PCM
1262 wavetable_size - max wavetable size in kB (4-?kb)
1264 Module supports up to 8 cards and autoprobe.
1266 The power-management is supported.
1268 Module snd-usb-audio
1269 --------------------
1271 Module for USB audio and USB MIDI devices.
1273 vid - Vendor ID for the device (optional)
1274 pid - Product ID for the device (optional)
1276 This module supports up to 8 cards, autoprobe and hotplugging.
1278 Module snd-usb-usx2y
1279 --------------------
1281 Module for Tascam USB US-122, US-224 and US-428 devices.
1283 This module supports up to 8 cards, autoprobe and hotplugging.
1285 Note: you need to load the firmware via usx2yloader utility included
1286 in alsa-tools and alsa-firmware packages.
1291 Module for AC'97 motherboards based on VIA 82C686A/686B, 8233,
1292 8233A, 8233C, 8235, 8237 (south) bridge.
1294 mpu_port - 0x300,0x310,0x320,0x330, otherwise obtain BIOS setup
1296 joystick - Enable joystick (default off) [VIA686A/686B only]
1297 ac97_clock - AC'97 codec clock base (default 48000Hz)
1298 dxs_support - support DXS channels,
1299 0 = auto (default), 1 = enable, 2 = disable,
1300 3 = 48k only, 4 = no VRA, 5 = enable any sample
1301 rate and different sample rates on different
1303 [VIA8233/C, 8235, 8237 only]
1304 ac97_quirk - AC'97 workaround for strange hardware
1305 See the description of intel8x0 module for details.
1307 Module supports autoprobe and multiple bus-master chips (max 8).
1309 Note: on some SMP motherboards like MSI 694D the interrupts might
1310 not be generated properly. In such a case, please try to
1311 set the SMP (or MPS) version on BIOS to 1.1 instead of
1312 default value 1.4. Then the interrupt number will be
1313 assigned under 15. You might also upgrade your BIOS.
1315 Note: VIA8233/5/7 (not VIA8233A) can support DXS (direct sound)
1316 channels as the first PCM. On these channels, up to 4
1317 streams can be played at the same time, and the controller
1318 can perform sample rate conversion with separate rates for
1320 As default (dxs_support = 0), 48k fixed rate is chosen
1321 except for the known devices since the output is often
1322 noisy except for 48k on some mother boards due to the
1324 Please try once dxs_support=5 and if it works on other
1325 sample rates (e.g. 44.1kHz of mp3 playback), please let us
1326 know the PCI subsystem vendor/device id's (output of
1328 If dxs_support=5 does not work, try dxs_support=4; if it
1329 doesn't work too, try dxs_support=1. (dxs_support=1 is
1330 usually for old motherboards. The correct implementated
1331 board should work with 4 or 5.) If it still doesn't
1332 work and the default setting is ok, dxs_support=3 is the
1333 right choice. If the default setting doesn't work at all,
1334 try dxs_support=2 to disable the DXS channels.
1335 In any cases, please let us know the result and the
1336 subsystem vendor/device ids.
1338 Note: for the MPU401 on VIA823x, use snd-mpu401 driver
1339 additonally. The mpu_port option is for VIA686 chips only.
1341 Module snd-via82xx-modem
1342 ------------------------
1344 Module for VIA82xx AC97 modem
1346 ac97_clock - AC'97 codec clock base (default 48000Hz)
1348 Module supports up to 8 cards.
1350 Note: The default index value of this module is -2, i.e. the first
1356 Module for virtual rawmidi devices.
1357 This module creates virtual rawmidi devices which communicate
1358 to the corresponding ALSA sequencer ports.
1360 midi_devs - MIDI devices # (1-8, default=4)
1362 Module supports up to 8 cards.
1367 Module for Digigram VX-Pocket VX222, V222 v2 and Mic cards.
1369 mic - Enable Microphone on V222 Mic (NYI)
1370 ibl - Capture IBL size. (default = 0, minimum size)
1372 Module supports up to 8 cards.
1374 When the driver is compiled as a module and the hotplug firmware
1375 is supported, the firmware data is loaded via hotplug automatically.
1376 Install the necessary firmware files in alsa-firmware package.
1377 When no hotplug fw loader is available, you need to load the
1378 firmware via vxloader utility in alsa-tools package. To invoke
1379 vxloader automatically, add the following to /etc/modprobe.conf
1381 install snd-vx222 /sbin/modprobe --first-time -i snd-vx222 && /usr/bin/vxloader
1383 (for 2.2/2.4 kernels, add "post-install /usr/bin/vxloader" to
1384 /etc/modules.conf, instead.)
1385 IBL size defines the interrupts period for PCM. The smaller size
1386 gives smaller latency but leads to more CPU consumption, too.
1387 The size is usually aligned to 126. As default (=0), the smallest
1388 size is chosen. The possible IBL values can be found in
1389 /proc/asound/cardX/vx-status proc file.
1394 Module for Digigram VX-Pocket VX2 and 440 PCMCIA cards.
1396 ibl - Capture IBL size. (default = 0, minimum size)
1398 Module supports up to 8 cards. The module is compiled only when
1399 PCMCIA is supported on kernel.
1401 To activate the driver via the card manager, you'll need to set
1402 up /etc/pcmcia/vxpocket.conf. See the sound/pcmcia/vx/vxpocket.c.
1404 When the driver is compiled as a module and the hotplug firmware
1405 is supported, the firmware data is loaded via hotplug automatically.
1406 Install the necessary firmware files in alsa-firmware package.
1407 When no hotplug fw loader is available, you need to load the
1408 firmware via vxloader utility in alsa-tools package.
1410 About capture IBL, see the description of snd-vx222 module.
1412 Note: the driver is build only when CONFIG_ISA is set.
1417 Module for Yamaha PCI chips (YMF72x, YMF74x & YMF75x).
1419 mpu_port - 0x300,0x330,0x332,0x334, 0 (disable) by default,
1420 1 (auto-detect for YMF744/754 only)
1421 fm_port - 0x388,0x398,0x3a0,0x3a8, 0 (disable) by default
1422 1 (auto-detect for YMF744/754 only)
1423 joystick_port - 0x201,0x202,0x204,0x205, 0 (disable) by default,
1425 rear_switch - enable shared rear/line-in switch (bool)
1427 Module supports autoprobe and multiple chips (max 8).
1429 The power-management is supported.
1431 Module snd-pdaudiocf
1432 --------------------
1434 Module for Sound Core PDAudioCF sound card.
1436 Note: the driver is build only when CONFIG_ISA is set.
1439 Configuring Non-ISAPNP Cards
1440 ============================
1442 When the kernel is configured with ISA-PnP support, the modules
1443 supporting the isapnp cards will have module options "isapnp".
1444 If this option is set, *only* the ISA-PnP devices will be probed.
1445 For probing the non ISA-PnP cards, you have to pass "isapnp=0" option
1446 together with the proper i/o and irq configuration.
1448 When the kernel is configured without ISA-PnP support, isapnp option
1449 will be not built in.
1452 Module Autoloading Support
1453 ==========================
1455 The ALSA drivers can be loaded automatically on demand by defining
1456 module aliases. The string 'snd-card-%1' is requested for ALSA native
1457 devices where %i is sound card number from zero to seven.
1459 To auto-load an ALSA driver for OSS services, define the string
1460 'sound-slot-%i' where %i means the slot number for OSS, which
1461 corresponds to the card index of ALSA. Usually, define this
1462 as the the same card module.
1464 An example configuration for a single emu10k1 card is like below:
1465 ----- /etc/modprobe.conf
1466 alias snd-card-0 snd-emu10k1
1467 alias sound-slot-0 snd-emu10k1
1468 ----- /etc/modprobe.conf
1470 The available number of auto-loaded sound cards depends on the module
1471 option "cards_limit" of snd module. As default it's set to 1.
1472 To enable the auto-loading of multiple cards, specify the number of
1473 sound cards in that option.
1475 When multiple cards are available, it'd better to specify the index
1476 number for each card via module option, too, so that the order of
1477 cards is kept consistent.
1479 An example configuration for two sound cards is like below:
1481 ----- /etc/modprobe.conf
1483 options snd cards_limit=2
1484 alias snd-card-0 snd-interwave
1485 alias snd-card-1 snd-ens1371
1486 options snd-interwave index=0
1487 options snd-ens1371 index=1
1489 alias sound-slot-0 snd-interwave
1490 alias sound-slot-1 snd-ens1371
1491 ----- /etc/moprobe.conf
1493 In this example, the interwave card is always loaded as the first card
1494 (index 0) and ens1371 as the second (index 1).
1497 ALSA PCM devices to OSS devices mapping
1498 =======================================
1500 /dev/snd/pcmC0D0[c|p] -> /dev/audio0 (/dev/audio) -> minor 4
1501 /dev/snd/pcmC0D0[c|p] -> /dev/dsp0 (/dev/dsp) -> minor 3
1502 /dev/snd/pcmC0D1[c|p] -> /dev/adsp0 (/dev/adsp) -> minor 12
1503 /dev/snd/pcmC1D0[c|p] -> /dev/audio1 -> minor 4+16 = 20
1504 /dev/snd/pcmC1D0[c|p] -> /dev/dsp1 -> minor 3+16 = 19
1505 /dev/snd/pcmC1D1[c|p] -> /dev/adsp1 -> minor 12+16 = 28
1506 /dev/snd/pcmC2D0[c|p] -> /dev/audio2 -> minor 4+32 = 36
1507 /dev/snd/pcmC2D0[c|p] -> /dev/dsp2 -> minor 3+32 = 39
1508 /dev/snd/pcmC2D1[c|p] -> /dev/adsp2 -> minor 12+32 = 44
1510 The first number from /dev/snd/pcmC{X}D{Y}[c|p] expression means
1511 sound card number and second means device number. The ALSA devices
1512 have either 'c' or 'p' suffix indicating the direction, capture and
1513 playback, respectively.
1515 Please note that the device mapping above may be varied via the module
1516 options of snd-pcm-oss module.
1522 The ALSA driver fully supports the devfs extension.
1523 You should add lines below to your devfsd.conf file:
1525 LOOKUP snd MODLOAD ACTION snd
1526 REGISTER ^sound/.* PERMISSIONS root.audio 660
1527 REGISTER ^snd/.* PERMISSIONS root.audio 660
1529 Warning: These lines assume that you have the audio group in your system.
1530 Otherwise replace audio word with another group name (root for
1534 Proc interfaces (/proc/asound)
1535 ==============================
1537 /proc/asound/card#/pcm#[cp]/oss
1538 -------------------------------
1539 String "erase" - erase all additional informations about OSS applications
1540 String "<app_name> <fragments> <fragment_size> [<options>]"
1542 <app_name> - name of application with (higher priority) or without path
1543 <fragments> - number of fragments or zero if auto
1544 <fragment_size> - size of fragment in bytes or zero if auto
1545 <options> - optional parameters
1546 - disable the application tries to open a pcm device for
1547 this channel but does not want to use it.
1548 (Cause a bug or mmap needs)
1549 It's good for Quake etc...
1550 - direct don't use plugins
1551 - block force block mode (rvplayer)
1552 - non-block force non-block mode
1553 - whole-frag write only whole fragments (optimization affecting
1555 - no-silence do not fill silence ahead to avoid clicks
1557 Example: echo "x11amp 128 16384" > /proc/asound/card0/pcm0p/oss
1558 echo "squake 0 0 disable" > /proc/asound/card0/pcm0c/oss
1559 echo "rvplayer 0 0 block" > /proc/asound/card0/pcm0p/oss
1562 Early Buffer Allocation
1563 =======================
1565 Some drivers (e.g. hdsp) require the large contiguous buffers, and
1566 sometimes it's too late to find such spaces when the driver module is
1567 actually loaded due to memory fragmentation. You can pre-allocate the
1568 PCM buffers by loading snd-page-alloc module and write commands to its
1569 proc file in prior, for example, in the early boot stage like
1570 /etc/init.d/*.local scripts.
1572 Reading the proc file /proc/drivers/snd-page-alloc shows the current
1573 usage of page allocation. In writing, you can send the following
1574 commands to the snd-page-alloc driver:
1576 - add VENDOR DEVICE MASK SIZE BUFFERS
1578 VENDOR and DEVICE are PCI vendor and device IDs. They take
1579 integer numbers (0x prefix is needed for the hex).
1580 MASK is the PCI DMA mask. Pass 0 if not restricted.
1581 SIZE is the size of each buffer to allocate. You can pass
1582 k and m suffix for KB and MB. The max number is 16MB.
1583 BUFFERS is the number of buffers to allocate. It must be greater
1584 than 0. The max number is 4.
1588 This will erase the all pre-allocated buffers which are not in
1595 ALSA project homepage
1596 http://www.alsa-project.org