Capture device handling on Acer Aspire One 531h
Submitted by Dmitrij D. Czarkoff
Assigned to pul..@..op.org
On Acer Aspire One 531h there are two microphones:
- internal, works;
- mic jack, doesn't work, seems to be hardware fault. May be is aggregated with internal mic, I can't test it.
From now on I refere to internal micorophone as "mic".
Alsa gives three capture controls:
- Mic Boost - probably boosts something, but no audible effect (with my ears);
- Capture - controls the internal mic.
- Capture 1 - controls nothing.
Pulseaudio gives one two-channel control.
With alsa applications everything works as expected - the mic works, records in two-channel mode. Eg., in gnome-sound-recorder.
In pulsaudio the capture records nothing with capture level up on both channels. More interestingly, the actual volume seems to be the difference between the channels' volumes. Eg., if left channel is set to 0 in alsamixer and right channel is set to 100, sound is loud, in combination 0-50 - half of previous.