1
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
15config SND_COMPRESS_OFFLOAD
16 tristate
17
18
19
20
21config SND_JACK
22 bool
23
24config SND_SEQUENCER
25 tristate "Sequencer support"
26 select SND_TIMER
27 help
28 Say Y or M to enable MIDI sequencer and router support. This
29 feature allows routing and enqueueing of MIDI events. Events
30 can be processed at a given time.
31
32 Many programs require this feature, so you should enable it
33 unless you know what you're doing.
34
35config SND_SEQ_DUMMY
36 tristate "Sequencer dummy client"
37 depends on SND_SEQUENCER
38 help
39 Say Y here to enable the dummy sequencer client. This client
40 is a simple MIDI-through client: all normal input events are
41 redirected to the output port immediately.
42
43 You don't need this unless you want to connect many MIDI
44 devices or applications together.
45
46 To compile this driver as a module, choose M here: the module
47 will be called snd-seq-dummy.
48
49config SND_OSSEMUL
50 select SOUND_OSS_CORE
51 bool
52
53config SND_MIXER_OSS
54 tristate "OSS Mixer API"
55 select SND_OSSEMUL
56 help
57 To enable OSS mixer API emulation (/dev/mixer*), say Y here
58 and read <file:Documentation/sound/alsa/OSS-Emulation.txt>.
59
60 Many programs still use the OSS API, so say Y.
61
62 To compile this driver as a module, choose M here: the module
63 will be called snd-mixer-oss.
64
65config SND_PCM_OSS
66 tristate "OSS PCM (digital audio) API"
67 select SND_OSSEMUL
68 select SND_PCM
69 help
70 To enable OSS digital audio (PCM) emulation (/dev/dsp*), say Y
71 here and read <file:Documentation/sound/alsa/OSS-Emulation.txt>.
72
73 Many programs still use the OSS API, so say Y.
74
75 To compile this driver as a module, choose M here: the module
76 will be called snd-pcm-oss.
77
78config SND_PCM_OSS_PLUGINS
79 bool "OSS PCM (digital audio) API - Include plugin system"
80 depends on SND_PCM_OSS
81 default y
82 help
83 If you disable this option, the ALSA's OSS PCM API will not
84 support conversion of channels, formats and rates. It will
85 behave like most of new OSS/Free drivers in 2.4/2.6 kernels.
86
87config SND_SEQUENCER_OSS
88 bool "OSS Sequencer API"
89 depends on SND_SEQUENCER
90 select SND_OSSEMUL
91 help
92 Say Y here to enable OSS sequencer emulation (both
93 /dev/sequencer and /dev/music interfaces).
94
95 Many programs still use the OSS API, so say Y.
96
97 If you choose M in "Sequencer support" (SND_SEQUENCER),
98 this will be compiled as a module. The module will be called
99 snd-seq-oss.
100
101config SND_HRTIMER
102 tristate "HR-timer backend support"
103 depends on HIGH_RES_TIMERS
104 select SND_TIMER
105 help
106 Say Y here to enable HR-timer backend for ALSA timer. ALSA uses
107 the hrtimer as a precise timing source. The ALSA sequencer code
108 also can use this timing source.
109
110 To compile this driver as a module, choose M here: the module
111 will be called snd-hrtimer.
112
113config SND_SEQ_HRTIMER_DEFAULT
114 bool "Use HR-timer as default sequencer timer"
115 depends on SND_HRTIMER && SND_SEQUENCER
116 default y
117 help
118 Say Y here to use the HR-timer backend as the default sequencer
119 timer.
120
121config SND_RTCTIMER
122 tristate "RTC Timer support"
123 depends on RTC
124 select SND_TIMER
125 help
126 Say Y here to enable RTC timer support for ALSA. ALSA uses
127 the RTC timer as a precise timing source and maps the RTC
128 timer to ALSA's timer interface. The ALSA sequencer code also
129 can use this timing source.
130
131 To compile this driver as a module, choose M here: the module
132 will be called snd-rtctimer.
133
134 Note that this option is exclusive with the new RTC drivers
135 (CONFIG_RTC_CLASS) since this requires the old API.
136
137config SND_SEQ_RTCTIMER_DEFAULT
138 bool "Use RTC as default sequencer timer"
139 depends on SND_RTCTIMER && SND_SEQUENCER
140 depends on !SND_SEQ_HRTIMER_DEFAULT
141 default y
142 help
143 Say Y here to use the RTC timer as the default sequencer
144 timer. This is strongly recommended because it ensures
145 precise MIDI timing even when the system timer runs at less
146 than 1000 Hz.
147
148 If in doubt, say Y.
149
150config SND_DYNAMIC_MINORS
151 bool "Dynamic device file minor numbers"
152 help
153 If you say Y here, the minor numbers of ALSA device files in
154 /dev/snd/ are allocated dynamically. This allows you to have
155 more than 8 sound cards, but requires a dynamic device file
156 system like udev.
157
158 If you are unsure about this, say N here.
159
160config SND_SUPPORT_OLD_API
161 bool "Support old ALSA API"
162 default y
163 help
164 Say Y here to support the obsolete ALSA PCM API (ver.0.9.0 rc3
165 or older).
166
167config SND_VERBOSE_PROCFS
168 bool "Verbose procfs contents"
169 depends on PROC_FS
170 default y
171 help
172 Say Y here to include code for verbose procfs contents (provides
173 useful information to developers when a problem occurs). On the
174 other side, it makes the ALSA subsystem larger.
175
176config SND_VERBOSE_PRINTK
177 bool "Verbose printk"
178 help
179 Say Y here to enable verbose log messages. These messages
180 will help to identify source file and position containing
181 printed messages.
182
183 You don't need this unless you're debugging ALSA.
184
185config SND_DEBUG
186 bool "Debug"
187 help
188 Say Y here to enable ALSA debug code.
189
190config SND_DEBUG_VERBOSE
191 bool "More verbose debug"
192 depends on SND_DEBUG
193 help
194 Say Y here to enable extra-verbose debugging messages.
195
196 Let me repeat: it enables EXTRA-VERBOSE DEBUGGING messages.
197 So, say Y only if you are ready to be annoyed.
198
199config SND_PCM_XRUN_DEBUG
200 bool "Enable PCM ring buffer overrun/underrun debugging"
201 default n
202 depends on SND_DEBUG && SND_VERBOSE_PROCFS
203 help
204 Say Y to enable the PCM ring buffer overrun/underrun debugging.
205 It is usually not required, but if you have trouble with
206 sound clicking when system is loaded, it may help to determine
207 the process or driver which causes the scheduling gaps.
208
209config SND_VMASTER
210 bool
211
212config SND_KCTL_JACK
213 bool
214
215config SND_DMA_SGBUF
216 def_bool y
217 depends on X86
218
219source "sound/core/seq/Kconfig"
220
