1# ALSA soundcard-configuration 2config SND_TIMER 3 tristate 4 5config SND_PCM 6 tristate 7 select SND_TIMER 8 select GCD 9 10config SND_HWDEP 11 tristate 12 13config SND_RAWMIDI 14 tristate 15 16# To be effective this also requires INPUT - users should say: 17# select SND_JACK if INPUT=y || INPUT=SND 18# to avoid having to force INPUT on. 19config SND_JACK 20 bool 21 22config SND_SEQUENCER 23 tristate "Sequencer support" 24 select SND_TIMER 25 help 26 Say Y or M to enable MIDI sequencer and router support. This 27 feature allows routing and enqueueing of MIDI events. Events 28 can be processed at a given time. 29 30 Many programs require this feature, so you should enable it 31 unless you know what you're doing. 32 33config SND_SEQ_DUMMY 34 tristate "Sequencer dummy client" 35 depends on SND_SEQUENCER 36 help 37 Say Y here to enable the dummy sequencer client. This client 38 is a simple MIDI-through client: all normal input events are 39 redirected to the output port immediately. 40 41 You don't need this unless you want to connect many MIDI 42 devices or applications together. 43 44 To compile this driver as a module, choose M here: the module 45 will be called snd-seq-dummy. 46 47config SND_OSSEMUL 48 select SOUND_OSS_CORE 49 bool 50 51config SND_MIXER_OSS 52 tristate "OSS Mixer API" 53 select SND_OSSEMUL 54 help 55 To enable OSS mixer API emulation (/dev/mixer*), say Y here 56 and read <file:Documentation/sound/alsa/OSS-Emulation.txt>. 57 58 Many programs still use the OSS API, so say Y. 59 60 To compile this driver as a module, choose M here: the module 61 will be called snd-mixer-oss. 62 63config SND_PCM_OSS 64 tristate "OSS PCM (digital audio) API" 65 select SND_OSSEMUL 66 select SND_PCM 67 help 68 To enable OSS digital audio (PCM) emulation (/dev/dsp*), say Y 69 here and read <file:Documentation/sound/alsa/OSS-Emulation.txt>. 70 71 Many programs still use the OSS API, so say Y. 72 73 To compile this driver as a module, choose M here: the module 74 will be called snd-pcm-oss. 75 76config SND_PCM_OSS_PLUGINS 77 bool "OSS PCM (digital audio) API - Include plugin system" 78 depends on SND_PCM_OSS 79 default y 80 help 81 If you disable this option, the ALSA's OSS PCM API will not 82 support conversion of channels, formats and rates. It will 83 behave like most of new OSS/Free drivers in 2.4/2.6 kernels. 84 85config SND_SEQUENCER_OSS 86 bool "OSS Sequencer API" 87 depends on SND_SEQUENCER 88 select SND_OSSEMUL 89 help 90 Say Y here to enable OSS sequencer emulation (both 91 /dev/sequencer and /dev/music interfaces). 92 93 Many programs still use the OSS API, so say Y. 94 95 If you choose M in "Sequencer support" (SND_SEQUENCER), 96 this will be compiled as a module. The module will be called 97 snd-seq-oss. 98 99config SND_HRTIMER 100 tristate "HR-timer backend support" 101 depends on HIGH_RES_TIMERS 102 select SND_TIMER 103 help 104 Say Y here to enable HR-timer backend for ALSA timer. ALSA uses 105 the hrtimer as a precise timing source. The ALSA sequencer code 106 also can use this timing source. 107 108 To compile this driver as a module, choose M here: the module 109 will be called snd-hrtimer. 110 111config SND_SEQ_HRTIMER_DEFAULT 112 bool "Use HR-timer as default sequencer timer" 113 depends on SND_HRTIMER && SND_SEQUENCER 114 default y 115 help 116 Say Y here to use the HR-timer backend as the default sequencer 117 timer. 118 119config SND_RTCTIMER 120 tristate "RTC Timer support" 121 depends on RTC 122 select SND_TIMER 123 help 124 Say Y here to enable RTC timer support for ALSA. ALSA uses 125 the RTC timer as a precise timing source and maps the RTC 126 timer to ALSA's timer interface. The ALSA sequencer code also 127 can use this timing source. 128 129 To compile this driver as a module, choose M here: the module 130 will be called snd-rtctimer. 131 132 Note that this option is exclusive with the new RTC drivers 133 (CONFIG_RTC_CLASS) since this requires the old API. 134 135config SND_SEQ_RTCTIMER_DEFAULT 136 bool "Use RTC as default sequencer timer" 137 depends on SND_RTCTIMER && SND_SEQUENCER 138 depends on !SND_SEQ_HRTIMER_DEFAULT 139 default y 140 help 141 Say Y here to use the RTC timer as the default sequencer 142 timer. This is strongly recommended because it ensures 143 precise MIDI timing even when the system timer runs at less 144 than 1000 Hz. 145 146 If in doubt, say Y. 147 148config SND_DYNAMIC_MINORS 149 bool "Dynamic device file minor numbers" 150 help 151 If you say Y here, the minor numbers of ALSA device files in 152 /dev/snd/ are allocated dynamically. This allows you to have 153 more than 8 sound cards, but requires a dynamic device file 154 system like udev. 155 156 If you are unsure about this, say N here. 157 158config SND_SUPPORT_OLD_API 159 bool "Support old ALSA API" 160 default y 161 help 162 Say Y here to support the obsolete ALSA PCM API (ver.0.9.0 rc3 163 or older). 164 165config SND_VERBOSE_PROCFS 166 bool "Verbose procfs contents" 167 depends on PROC_FS 168 default y 169 help 170 Say Y here to include code for verbose procfs contents (provides 171 useful information to developers when a problem occurs). On the 172 other side, it makes the ALSA subsystem larger. 173 174config SND_VERBOSE_PRINTK 175 bool "Verbose printk" 176 help 177 Say Y here to enable verbose log messages. These messages 178 will help to identify source file and position containing 179 printed messages. 180 181 You don't need this unless you're debugging ALSA. 182 183config SND_DEBUG 184 bool "Debug" 185 help 186 Say Y here to enable ALSA debug code. 187 188config SND_DEBUG_VERBOSE 189 bool "More verbose debug" 190 depends on SND_DEBUG 191 help 192 Say Y here to enable extra-verbose debugging messages. 193 194 Let me repeat: it enables EXTRA-VERBOSE DEBUGGING messages. 195 So, say Y only if you are ready to be annoyed. 196 197config SND_PCM_XRUN_DEBUG 198 bool "Enable PCM ring buffer overrun/underrun debugging" 199 default n 200 depends on SND_DEBUG && SND_VERBOSE_PROCFS 201 help 202 Say Y to enable the PCM ring buffer overrun/underrun debugging. 203 It is usually not required, but if you have trouble with 204 sound clicking when system is loaded, it may help to determine 205 the process or driver which causes the scheduling gaps. 206 207config SND_VMASTER 208 bool 209 210config SND_KCTL_JACK 211 bool 212 213config SND_DMA_SGBUF 214 def_bool y 215 depends on X86 216 217source "sound/core/seq/Kconfig" 218