11da177e4SLinus Torvalds# ALSA soundcard-configuration 21da177e4SLinus Torvaldsconfig SND_TIMER 31da177e4SLinus Torvalds tristate 41da177e4SLinus Torvalds depends on SND 51da177e4SLinus Torvalds 61da177e4SLinus Torvaldsconfig SND_PCM 71da177e4SLinus Torvalds tristate 81da177e4SLinus Torvalds select SND_TIMER 91da177e4SLinus Torvalds depends on SND 101da177e4SLinus Torvalds 111da177e4SLinus Torvaldsconfig SND_HWDEP 121da177e4SLinus Torvalds tristate 131da177e4SLinus Torvalds depends on SND 141da177e4SLinus Torvalds 151da177e4SLinus Torvaldsconfig SND_RAWMIDI 161da177e4SLinus Torvalds tristate 171da177e4SLinus Torvalds depends on SND 181da177e4SLinus Torvalds 191da177e4SLinus Torvaldsconfig SND_SEQUENCER 201da177e4SLinus Torvalds tristate "Sequencer support" 211da177e4SLinus Torvalds depends on SND 221da177e4SLinus Torvalds select SND_TIMER 231da177e4SLinus Torvalds help 241da177e4SLinus Torvalds Say Y or M to enable MIDI sequencer and router support. This 251da177e4SLinus Torvalds feature allows routing and enqueueing of MIDI events. Events 261da177e4SLinus Torvalds can be processed at a given time. 271da177e4SLinus Torvalds 281da177e4SLinus Torvalds Many programs require this feature, so you should enable it 291da177e4SLinus Torvalds unless you know what you're doing. 301da177e4SLinus Torvalds 311da177e4SLinus Torvaldsconfig SND_SEQ_DUMMY 321da177e4SLinus Torvalds tristate "Sequencer dummy client" 331da177e4SLinus Torvalds depends on SND_SEQUENCER 341da177e4SLinus Torvalds help 351da177e4SLinus Torvalds Say Y here to enable the dummy sequencer client. This client 361da177e4SLinus Torvalds is a simple MIDI-through client: all normal input events are 371da177e4SLinus Torvalds redirected to the output port immediately. 381da177e4SLinus Torvalds 391da177e4SLinus Torvalds You don't need this unless you want to connect many MIDI 401da177e4SLinus Torvalds devices or applications together. 411da177e4SLinus Torvalds 421da177e4SLinus Torvalds To compile this driver as a module, choose M here: the module 431da177e4SLinus Torvalds will be called snd-seq-dummy. 441da177e4SLinus Torvalds 451da177e4SLinus Torvaldsconfig SND_OSSEMUL 461da177e4SLinus Torvalds bool 471da177e4SLinus Torvalds depends on SND 481da177e4SLinus Torvalds 491da177e4SLinus Torvaldsconfig SND_MIXER_OSS 501da177e4SLinus Torvalds tristate "OSS Mixer API" 511da177e4SLinus Torvalds depends on SND 521da177e4SLinus Torvalds select SND_OSSEMUL 531da177e4SLinus Torvalds help 541da177e4SLinus Torvalds To enable OSS mixer API emulation (/dev/mixer*), say Y here 551da177e4SLinus Torvalds and read <file:Documentation/sound/alsa/OSS-Emulation.txt>. 561da177e4SLinus Torvalds 571da177e4SLinus Torvalds Many programs still use the OSS API, so say Y. 581da177e4SLinus Torvalds 591da177e4SLinus Torvalds To compile this driver as a module, choose M here: the module 601da177e4SLinus Torvalds will be called snd-mixer-oss. 611da177e4SLinus Torvalds 621da177e4SLinus Torvaldsconfig SND_PCM_OSS 631da177e4SLinus Torvalds tristate "OSS PCM (digital audio) API" 641da177e4SLinus Torvalds depends on SND 651da177e4SLinus Torvalds select SND_OSSEMUL 661da177e4SLinus Torvalds select SND_PCM 671da177e4SLinus Torvalds help 681da177e4SLinus Torvalds To enable OSS digital audio (PCM) emulation (/dev/dsp*), say Y 691da177e4SLinus Torvalds here and read <file:Documentation/sound/alsa/OSS-Emulation.txt>. 701da177e4SLinus Torvalds 711da177e4SLinus Torvalds Many programs still use the OSS API, so say Y. 721da177e4SLinus Torvalds 731da177e4SLinus Torvalds To compile this driver as a module, choose M here: the module 741da177e4SLinus Torvalds will be called snd-pcm-oss. 751da177e4SLinus Torvalds 7621a3479aSJaroslav Kyselaconfig SND_PCM_OSS_PLUGINS 7721a3479aSJaroslav Kysela bool "OSS PCM (digital audio) API - Include plugin system" 7821a3479aSJaroslav Kysela depends on SND_PCM_OSS 7921a3479aSJaroslav Kysela default y 8021a3479aSJaroslav Kysela help 8121a3479aSJaroslav Kysela If you disable this option, the ALSA's OSS PCM API will not 8221a3479aSJaroslav Kysela support conversion of channels, formats and rates. It will 8321a3479aSJaroslav Kysela behave like most of new OSS/Free drivers in 2.4/2.6 kernels. 8421a3479aSJaroslav Kysela 851da177e4SLinus Torvaldsconfig SND_SEQUENCER_OSS 861da177e4SLinus Torvalds bool "OSS Sequencer API" 871da177e4SLinus Torvalds depends on SND && SND_SEQUENCER 881da177e4SLinus Torvalds select SND_OSSEMUL 891da177e4SLinus Torvalds help 901da177e4SLinus Torvalds Say Y here to enable OSS sequencer emulation (both 911da177e4SLinus Torvalds /dev/sequencer and /dev/music interfaces). 921da177e4SLinus Torvalds 931da177e4SLinus Torvalds Many programs still use the OSS API, so say Y. 941da177e4SLinus Torvalds 95c2f60c52SFrederik Deweerdt If you choose M in "Sequencer support" (SND_SEQUENCER), 96c2f60c52SFrederik Deweerdt this will be compiled as a module. The module will be called 97c2f60c52SFrederik Deweerdt snd-seq-oss. 981da177e4SLinus Torvalds 991da177e4SLinus Torvaldsconfig SND_RTCTIMER 1001da177e4SLinus Torvalds tristate "RTC Timer support" 1011da177e4SLinus Torvalds depends on SND && RTC 1021da177e4SLinus Torvalds select SND_TIMER 1031da177e4SLinus Torvalds help 1041da177e4SLinus Torvalds Say Y here to enable RTC timer support for ALSA. ALSA uses 1051da177e4SLinus Torvalds the RTC timer as a precise timing source and maps the RTC 1061da177e4SLinus Torvalds timer to ALSA's timer interface. The ALSA sequencer code also 1071da177e4SLinus Torvalds can use this timing source. 1081da177e4SLinus Torvalds 1091da177e4SLinus Torvalds To compile this driver as a module, choose M here: the module 1101da177e4SLinus Torvalds will be called snd-rtctimer. 1111da177e4SLinus Torvalds 112a4f508b2SClemens Ladischconfig SND_SEQ_RTCTIMER_DEFAULT 113a4f508b2SClemens Ladisch bool "Use RTC as default sequencer timer" 114a4f508b2SClemens Ladisch depends on SND_RTCTIMER && SND_SEQUENCER 115a4f508b2SClemens Ladisch default y 116a4f508b2SClemens Ladisch help 117a4f508b2SClemens Ladisch Say Y here to use the RTC timer as the default sequencer 118a4f508b2SClemens Ladisch timer. This is strongly recommended because it ensures 119a4f508b2SClemens Ladisch precise MIDI timing even when the system timer runs at less 120a4f508b2SClemens Ladisch than 1000 Hz. 121a4f508b2SClemens Ladisch 122a4f508b2SClemens Ladisch If in doubt, say Y. 123a4f508b2SClemens Ladisch 124332682b1SClemens Ladischconfig SND_DYNAMIC_MINORS 125332682b1SClemens Ladisch bool "Dynamic device file minor numbers (EXPERIMENTAL)" 126332682b1SClemens Ladisch depends on SND && EXPERIMENTAL 127332682b1SClemens Ladisch help 128332682b1SClemens Ladisch If you say Y here, the minor numbers of ALSA device files in 129332682b1SClemens Ladisch /dev/snd/ are allocated dynamically. This allows you to have 130332682b1SClemens Ladisch more than 8 sound cards, but requires a dynamic device file 131332682b1SClemens Ladisch system like udev. 132332682b1SClemens Ladisch 133332682b1SClemens Ladisch If you are unsure about this, say N here. 134332682b1SClemens Ladisch 13559d48582STakashi Iwaiconfig SND_SUPPORT_OLD_API 13659d48582STakashi Iwai bool "Support old ALSA API" 13759d48582STakashi Iwai depends on SND 13859d48582STakashi Iwai default y 13959d48582STakashi Iwai help 14059d48582STakashi Iwai Say Y here to support the obsolete ALSA PCM API (ver.0.9.0 rc3 14159d48582STakashi Iwai or older). 14259d48582STakashi Iwai 14321a3479aSJaroslav Kyselaconfig SND_VERBOSE_PROCFS 14421a3479aSJaroslav Kysela bool "Verbose procfs contents" 14521a3479aSJaroslav Kysela depends on SND 14621a3479aSJaroslav Kysela default y 14721a3479aSJaroslav Kysela help 14821a3479aSJaroslav Kysela Say Y here to include code for verbose procfs contents (provides 14921a3479aSJaroslav Kysela usefull information to developers when a problem occurs). On the 15021a3479aSJaroslav Kysela other side, it makes the ALSA subsystem larger. 15121a3479aSJaroslav Kysela 1521da177e4SLinus Torvaldsconfig SND_VERBOSE_PRINTK 1531da177e4SLinus Torvalds bool "Verbose printk" 1541da177e4SLinus Torvalds depends on SND 1551da177e4SLinus Torvalds help 1561da177e4SLinus Torvalds Say Y here to enable verbose log messages. These messages 1571da177e4SLinus Torvalds will help to identify source file and position containing 1581da177e4SLinus Torvalds printed messages. 1591da177e4SLinus Torvalds 1601da177e4SLinus Torvalds You don't need this unless you're debugging ALSA. 1611da177e4SLinus Torvalds 1621da177e4SLinus Torvaldsconfig SND_DEBUG 1631da177e4SLinus Torvalds bool "Debug" 1641da177e4SLinus Torvalds depends on SND 1651da177e4SLinus Torvalds help 1661da177e4SLinus Torvalds Say Y here to enable ALSA debug code. 1671da177e4SLinus Torvalds 1681da177e4SLinus Torvaldsconfig SND_DEBUG_DETECT 1691da177e4SLinus Torvalds bool "Debug detection" 1701da177e4SLinus Torvalds depends on SND_DEBUG 1711da177e4SLinus Torvalds help 1721da177e4SLinus Torvalds Say Y here to enable extra-verbose log messages printed when 1731da177e4SLinus Torvalds detecting devices. 174