1# ALSA soundcard-configuration 2config SND_TIMER 3 tristate 4 5config SND_PCM 6 tristate 7 select SND_TIMER 8 9config SND_HWDEP 10 tristate 11 12config SND_RAWMIDI 13 tristate 14 15# To be effective this also requires INPUT - users should say: 16# select SND_JACK if INPUT=y || INPUT=SND 17# to avoid having to force INPUT on. 18config SND_JACK 19 bool 20 21config SND_SEQUENCER 22 tristate "Sequencer support" 23 select SND_TIMER 24 help 25 Say Y or M to enable MIDI sequencer and router support. This 26 feature allows routing and enqueueing of MIDI events. Events 27 can be processed at a given time. 28 29 Many programs require this feature, so you should enable it 30 unless you know what you're doing. 31 32config SND_SEQ_DUMMY 33 tristate "Sequencer dummy client" 34 depends on SND_SEQUENCER 35 help 36 Say Y here to enable the dummy sequencer client. This client 37 is a simple MIDI-through client: all normal input events are 38 redirected to the output port immediately. 39 40 You don't need this unless you want to connect many MIDI 41 devices or applications together. 42 43 To compile this driver as a module, choose M here: the module 44 will be called snd-seq-dummy. 45 46config SND_OSSEMUL 47 select SOUND_OSS_CORE 48 bool 49 50config SND_MIXER_OSS 51 tristate "OSS Mixer API" 52 select SND_OSSEMUL 53 help 54 To enable OSS mixer API emulation (/dev/mixer*), say Y here 55 and read <file:Documentation/sound/alsa/OSS-Emulation.txt>. 56 57 Many programs still use the OSS API, so say Y. 58 59 To compile this driver as a module, choose M here: the module 60 will be called snd-mixer-oss. 61 62config SND_PCM_OSS 63 tristate "OSS PCM (digital audio) API" 64 select SND_OSSEMUL 65 select SND_PCM 66 help 67 To enable OSS digital audio (PCM) emulation (/dev/dsp*), say Y 68 here and read <file:Documentation/sound/alsa/OSS-Emulation.txt>. 69 70 Many programs still use the OSS API, so say Y. 71 72 To compile this driver as a module, choose M here: the module 73 will be called snd-pcm-oss. 74 75config SND_PCM_OSS_PLUGINS 76 bool "OSS PCM (digital audio) API - Include plugin system" 77 depends on SND_PCM_OSS 78 default y 79 help 80 If you disable this option, the ALSA's OSS PCM API will not 81 support conversion of channels, formats and rates. It will 82 behave like most of new OSS/Free drivers in 2.4/2.6 kernels. 83 84config SND_SEQUENCER_OSS 85 bool "OSS Sequencer API" 86 depends on SND_SEQUENCER 87 select SND_OSSEMUL 88 help 89 Say Y here to enable OSS sequencer emulation (both 90 /dev/sequencer and /dev/music interfaces). 91 92 Many programs still use the OSS API, so say Y. 93 94 If you choose M in "Sequencer support" (SND_SEQUENCER), 95 this will be compiled as a module. The module will be called 96 snd-seq-oss. 97 98config SND_RTCTIMER 99 tristate "RTC Timer support" 100 depends on RTC 101 select SND_TIMER 102 help 103 Say Y here to enable RTC timer support for ALSA. ALSA uses 104 the RTC timer as a precise timing source and maps the RTC 105 timer to ALSA's timer interface. The ALSA sequencer code also 106 can use this timing source. 107 108 To compile this driver as a module, choose M here: the module 109 will be called snd-rtctimer. 110 111 Note that this option is exclusive with the new RTC drivers 112 (CONFIG_RTC_CLASS) since this requires the old API. 113 114config SND_SEQ_RTCTIMER_DEFAULT 115 bool "Use RTC as default sequencer timer" 116 depends on SND_RTCTIMER && SND_SEQUENCER 117 default y 118 help 119 Say Y here to use the RTC timer as the default sequencer 120 timer. This is strongly recommended because it ensures 121 precise MIDI timing even when the system timer runs at less 122 than 1000 Hz. 123 124 If in doubt, say Y. 125 126config SND_DYNAMIC_MINORS 127 bool "Dynamic device file minor numbers" 128 help 129 If you say Y here, the minor numbers of ALSA device files in 130 /dev/snd/ are allocated dynamically. This allows you to have 131 more than 8 sound cards, but requires a dynamic device file 132 system like udev. 133 134 If you are unsure about this, say N here. 135 136config SND_SUPPORT_OLD_API 137 bool "Support old ALSA API" 138 default y 139 help 140 Say Y here to support the obsolete ALSA PCM API (ver.0.9.0 rc3 141 or older). 142 143config SND_VERBOSE_PROCFS 144 bool "Verbose procfs contents" 145 depends on PROC_FS 146 default y 147 help 148 Say Y here to include code for verbose procfs contents (provides 149 useful information to developers when a problem occurs). On the 150 other side, it makes the ALSA subsystem larger. 151 152config SND_VERBOSE_PRINTK 153 bool "Verbose printk" 154 help 155 Say Y here to enable verbose log messages. These messages 156 will help to identify source file and position containing 157 printed messages. 158 159 You don't need this unless you're debugging ALSA. 160 161config SND_DEBUG 162 bool "Debug" 163 help 164 Say Y here to enable ALSA debug code. 165 166config SND_DEBUG_VERBOSE 167 bool "More verbose debug" 168 depends on SND_DEBUG 169 help 170 Say Y here to enable extra-verbose debugging messages. 171 172 Let me repeat: it enables EXTRA-VERBOSE DEBUGGING messages. 173 So, say Y only if you are ready to be annoyed. 174 175config SND_PCM_XRUN_DEBUG 176 bool "Enable PCM ring buffer overrun/underrun debugging" 177 default n 178 depends on SND_DEBUG && SND_VERBOSE_PROCFS 179 help 180 Say Y to enable the PCM ring buffer overrun/underrun debugging. 181 It is usually not required, but if you have trouble with 182 sound clicking when system is loaded, it may help to determine 183 the process or driver which causes the scheduling gaps. 184 185config SND_VMASTER 186 bool 187