Recording audio

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(workaround for bug 2073)
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Mixer settings for voice recording: It is required that DAI Mode (alsa control number 50) is "DAI 1" - only recording, or "DAI 2" - recording and playback simultaneously. "DAI 0" is only for playback. There's also "DAI 3", but I don't know what this is.
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== For the impatient ==
  
Depending on the recording source, Mic1 for headset or Mic2 for handset have to be set accordingly via the Mic Selection Mux, which is alsa control number 53. Also, set Capture Left Mux and Capture Right Mux (65, 64) to PGA.
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Below is an alsa state file which can be used to put the device into voice recording mode.
  
Below is an alsa state file, which can be used to put the device into voice recording mode. It's advisable to have a programm connected to e.g. /dev/dsp, else the device might crash. Change settings via:
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alsactl -f [http://svn.arhuaco.org/svn/src/openmoko/misc-files/ALSA/voip-handset.state voip-handset.state] restore
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arecord -D hw -f cd  -v -t wav rec-$(date +%Y-%m-%d-%H-%M).wav
  
alsactl -f voice-recording.state restore
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== Applications that record audio ==
  
http://wildsau.enemy.org/~moko/voice-recording.state
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In alphabetical order.
  
arecord -D hw -f cd  -v -t wav rec-$(date +%Y-%m-%d-%H-%M).wav
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* http://wiki.openmoko.org/wiki/Guitartune
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* http://wiki.openmoko.org/wiki/Voicenote
  
Note: You need to start arecord first and have it block on input. When arecord is running you can restore voice-recoding.state. If you don't do this you get a kernel oops (see bug 2073). Similarly you need to restore normal alsa state before you kill arecord.
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== Hey, hey, here be dragons... I'm having lunch now.... ==
  
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Mixer settings for voice recording: It is required that DAI Mode (alsa control number 50) is "DAI 2". As of Feb/23 "DAI 1" is broken. Not all the DAI modes work and people are working on this (Check [https://docs.openmoko.org/trac/ticket/2073 #2073).
  
 
[[Category:Audio]]
 
[[Category:Audio]]

Revision as of 04:56, 23 February 2009

For the impatient

Below is an alsa state file which can be used to put the device into voice recording mode.

alsactl -f voip-handset.state restore
arecord -D hw -f cd  -v -t wav rec-$(date +%Y-%m-%d-%H-%M).wav

Applications that record audio

In alphabetical order.

Hey, hey, here be dragons... I'm having lunch now....

Mixer settings for voice recording: It is required that DAI Mode (alsa control number 50) is "DAI 2". As of Feb/23 "DAI 1" is broken. Not all the DAI modes work and people are working on this (Check [https://docs.openmoko.org/trac/ticket/2073 #2073).

Personal tools

Mixer settings for voice recording: It is required that DAI Mode (alsa control number 50) is "DAI 1" - only recording, or "DAI 2" - recording and playback simultaneously. "DAI 0" is only for playback. There's also "DAI 3", but I don't know what this is.

Depending on the recording source, Mic1 for headset or Mic2 for handset have to be set accordingly via the Mic Selection Mux, which is alsa control number 53. Also, set Capture Left Mux and Capture Right Mux (65, 64) to PGA.

Below is an alsa state file, which can be used to put the device into voice recording mode. It's advisable to have a programm connected to e.g. /dev/dsp, else the device might crash. Change settings via:

alsactl -f voice-recording.state restore

http://wildsau.enemy.org/~moko/voice-recording.state

arecord -D hw -f cd  -v -t wav rec-$(date +%Y-%m-%d-%H-%M).wav

Note: You need to start arecord first and have it block on input. When arecord is running you can restore voice-recoding.state. If you don't do this you get a kernel oops (see bug 2073). Similarly you need to restore normal alsa state before you kill arecord.