mixer_settings
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mixer_settings [2012/01/22 07:50] – created paulf | mixer_settings [2012/04/05 10:58] (current) – torwag | ||
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Understanding it doesn' | Understanding it doesn' | ||
- | * '' | + | * '' |
* '' | * '' | ||
+ | * DMIC is a digital microphone, connected to special pins of the integrated webcam | ||
* A triangle on the diagram means a sound amplifier | * A triangle on the diagram means a sound amplifier | ||
* A square marked '' | * A square marked '' | ||
Line 23: | Line 24: | ||
* '' | * '' | ||
* '' | * '' | ||
+ | * '' | ||
Should be set: | Should be set: | ||
* '' | * '' | ||
Line 29: | Line 31: | ||
Proper mono sound via MONO mixer or Speaker mixer is impossible to produce on unmodified hardware, see [[hw_problems# | Proper mono sound via MONO mixer or Speaker mixer is impossible to produce on unmodified hardware, see [[hw_problems# | ||
+ | |||
+ | ==== Stereo playback on headphones ==== | ||
+ | Same as stereo playback on integrated speakers but with | ||
+ | Enabled: | ||
+ | * '' | ||
+ | Set: | ||
+ | * '' | ||
+ | * '' | ||
+ | |||
+ | To mute the internal speakers you can disable '' | ||
+ | |||
+ | ==== Recording sound from integrated DMIC ==== | ||
+ | This can be used to record sound from the digital microphone integrated in the webcam module, useful for e.g. VoIP | ||
+ | Selected for capture: | ||
+ | * '' | ||
+ | * '' | ||
+ | * '' | ||
+ | Set: | ||
+ | * '' | ||
+ | Tweak '' | ||
+ | |||
+ | ==== Recording from external microphone ==== | ||
+ | Selected for capture: | ||
+ | * '' | ||
+ | Tweak '' | ||
+ | |||
+ | ==== Save and Restore different sound settings | ||
+ | Don't frighten you do not need to memorize all the above settings. | ||
+ | If you select the settings in alsamixer according to your needs type on the command line: | ||
+ | < | ||
+ | # alsactl store -f < | ||
+ | </code | ||
+ | e.g. | ||
+ | < | ||
+ | # alsactl store -f headphones.state | ||
+ | </ | ||
+ | Now, if you want to switch over to your headphone settings next time simply type | ||
+ | < | ||
+ | alsactl restore -f headphones.state | ||
+ | </ | ||
+ | Hence, you can save settings for internal speakers, headphones, mute all, etc. | ||
+ | If you do not want to type all the above to restore just create a little shell script (name it e.g. setsound.sh) to do that for you. | ||
+ | < | ||
+ | #!/bin/sh | ||
+ | # Set alsa sound to a predefined state | ||
+ | # save state via | ||
+ | # alsactl store -f < | ||
+ | # call this this by | ||
+ | # ./setsound headphones | ||
+ | |||
+ | alsactl restore -f {$1}.state | ||
+ | </ | ||
+ | make the file executable | ||
+ | < | ||
+ | # chmod +x ./ | ||
+ | </ | ||
+ | now you can set sound settings by simply typing | ||
+ | < | ||
+ | # ./ | ||
+ | </ | ||
+ | |||
+ | |||
+ | |||
+ |
mixer_settings.1327215036.txt.gz · Last modified: 2012/01/22 07:50 by paulf