[alsa-devel] Recording sound from microphone isn't good working that playback sound is distortion.
Hi, alsa-devel Platform: S3C6410, WM9713G codec with AC'97, Linux kernel 2.6.36. ALSL 1.0.23 lib and utils. Test process: 1. aplay WAV file is good working #aplay -D 'hw:0,0' -c 2 /opt/music.wav
2. arecord WAV file from Line in is good working. #arecord -D 'hw:0,0' -r 48000 -f S16_LE -c 2 | aplay -D 'hw:0,0' -c 2 &
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 & or #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. Please help me to fix up this bug, thanks. Best regards. Xiaoyong Wen, wen_kernel@163.com, 2012-07-31, 14:46:17.
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 & or #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.
participants (2)
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Mark Brown -
Xiaoyong Wen