[alsa-devel] Recording sound from microphone isn't good working that playback sound is distortion.
broonie at opensource.wolfsonmicro.com
Sat Aug 4 02:10:59 CEST 2012
On Tue, Jul 31, 2012 at 03:00:16PM +0800, Xiaoyong Wen wrote:
> 3. Recording sound from microphone isn't good working that playback sound is distortion.
> #arecord -D 'hw:0,0' -r 48000 -f S16_LE -c 2 | aplay -D 'hw:0,0' -c 2 &
> #arecord -d 10 -fdat test2.wav
> I hear the sound is very distortion and low.
> If I excute "amixer cset numid=9 3; amixer cset numid=7 31; amixer cset numid=87 on; amixer cset numid=6 31,31" command, and then volume is high.
This sounds fairly normal - microphones do need quite a bit of gain
applying to get useful signals. I don't know what controls those are
(the control names are much more useful, the numids do change between
boards) but I would expect that microphone configuration wouldn't be
ideal out of the box and would need some tuning for your system.
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