I found a fix for the issue. On Acer Aspire One A110 netbooks, the
following seems to work:
arecord -vv -f S16_LE -c2 -r8000 -d 5 test.wav; aplay test.wav
But this didn't:
arecord -vv -f S16_LE -c1 -r8000 -d 5 test.wav; aplay test.wav
On further investigation, it seems somehow having the Capture volume
fields in alsamixer "linked" together is causing the issue. I unlinked
them both by setting the left channel to 60% and the right channel to
0%. This fixed the above issue of recording with -c1.
Ekiga also works just fine with this setting. I think this bug needs to
be passed onto the alsa maintainer since it seems like wrong behavior
that mic recording is affected by Capture's individual channel volume
levels.
** Also affects: alsa-driver
Importance: Undecided
Status: New
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Low mic volume when calling on ekiga
https://bugs.launchpad.net/bugs/412106
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