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1 | # ALSA soundcard-configuration |
2 | config SND_TIMER |
3 | tristate |
4 | |
5 | config SND_PCM |
6 | tristate |
7 | select SND_TIMER |
8 | |
9 | config SND_HWDEP |
10 | tristate "Sound hardware support" |
11 | |
12 | config 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. |
18 | config SND_JACK |
19 | bool |
20 | |
21 | config 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 | |
32 | config 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 | |
46 | config SND_OSSEMUL |
47 | select SOUND_OSS_CORE |
48 | bool |
49 | |
50 | config 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 | |
62 | config 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 | |
75 | config 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 | |
84 | config 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 | |
98 | config SND_HRTIMER |
99 | tristate "HR-timer backend support" |
100 | depends on HIGH_RES_TIMERS |
101 | select SND_TIMER |
102 | help |
103 | Say Y here to enable HR-timer backend for ALSA timer. ALSA uses |
104 | the hrtimer as a precise timing source. The ALSA sequencer code |
105 | also can use this timing source. |
106 | |
107 | To compile this driver as a module, choose M here: the module |
108 | will be called snd-hrtimer. |
109 | |
110 | config SND_SEQ_HRTIMER_DEFAULT |
111 | bool "Use HR-timer as default sequencer timer" |
112 | depends on SND_HRTIMER && SND_SEQUENCER |
113 | default y |
114 | help |
115 | Say Y here to use the HR-timer backend as the default sequencer |
116 | timer. |
117 | |
118 | config SND_RTCTIMER |
119 | tristate "RTC Timer support" |
120 | depends on RTC |
121 | select SND_TIMER |
122 | help |
123 | Say Y here to enable RTC timer support for ALSA. ALSA uses |
124 | the RTC timer as a precise timing source and maps the RTC |
125 | timer to ALSA's timer interface. The ALSA sequencer code also |
126 | can use this timing source. |
127 | |
128 | To compile this driver as a module, choose M here: the module |
129 | will be called snd-rtctimer. |
130 | |
131 | Note that this option is exclusive with the new RTC drivers |
132 | (CONFIG_RTC_CLASS) since this requires the old API. |
133 | |
134 | config SND_SEQ_RTCTIMER_DEFAULT |
135 | bool "Use RTC as default sequencer timer" |
136 | depends on SND_RTCTIMER && SND_SEQUENCER |
137 | depends on !SND_SEQ_HRTIMER_DEFAULT |
138 | default y |
139 | help |
140 | Say Y here to use the RTC timer as the default sequencer |
141 | timer. This is strongly recommended because it ensures |
142 | precise MIDI timing even when the system timer runs at less |
143 | than 1000 Hz. |
144 | |
145 | If in doubt, say Y. |
146 | |
147 | config SND_DYNAMIC_MINORS |
148 | bool "Dynamic device file minor numbers" |
149 | help |
150 | If you say Y here, the minor numbers of ALSA device files in |
151 | /dev/snd/ are allocated dynamically. This allows you to have |
152 | more than 8 sound cards, but requires a dynamic device file |
153 | system like udev. |
154 | |
155 | If you are unsure about this, say N here. |
156 | |
157 | config SND_SUPPORT_OLD_API |
158 | bool "Support old ALSA API" |
159 | default y |
160 | help |
161 | Say Y here to support the obsolete ALSA PCM API (ver.0.9.0 rc3 |
162 | or older). |
163 | |
164 | config SND_VERBOSE_PROCFS |
165 | bool "Verbose procfs contents" |
166 | depends on PROC_FS |
167 | default y |
168 | help |
169 | Say Y here to include code for verbose procfs contents (provides |
170 | useful information to developers when a problem occurs). On the |
171 | other side, it makes the ALSA subsystem larger. |
172 | |
173 | config SND_VERBOSE_PRINTK |
174 | bool "Verbose printk" |
175 | help |
176 | Say Y here to enable verbose log messages. These messages |
177 | will help to identify source file and position containing |
178 | printed messages. |
179 | |
180 | You don't need this unless you're debugging ALSA. |
181 | |
182 | config SND_DEBUG |
183 | bool "Debug" |
184 | help |
185 | Say Y here to enable ALSA debug code. |
186 | |
187 | config SND_DEBUG_VERBOSE |
188 | bool "More verbose debug" |
189 | depends on SND_DEBUG |
190 | help |
191 | Say Y here to enable extra-verbose debugging messages. |
192 | |
193 | Let me repeat: it enables EXTRA-VERBOSE DEBUGGING messages. |
194 | So, say Y only if you are ready to be annoyed. |
195 | |
196 | config SND_PCM_XRUN_DEBUG |
197 | bool "Enable PCM ring buffer overrun/underrun debugging" |
198 | default n |
199 | depends on SND_DEBUG && SND_VERBOSE_PROCFS |
200 | help |
201 | Say Y to enable the PCM ring buffer overrun/underrun debugging. |
202 | It is usually not required, but if you have trouble with |
203 | sound clicking when system is loaded, it may help to determine |
204 | the process or driver which causes the scheduling gaps. |
205 | |
206 | config SND_VMASTER |
207 | bool |
208 | |
209 | config SND_DMA_SGBUF |
210 | def_bool y |
211 | depends on X86 |
212 | |
213 | source "sound/core/seq/Kconfig" |
214 |
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