* Recording sound from microphone isn't good working that playback sound is distortion.
@ 2012-07-31 7:00 Xiaoyong Wen
2012-08-04 0:10 ` Mark Brown
0 siblings, 1 reply; 2+ messages in thread
From: Xiaoyong Wen @ 2012-07-31 7:00 UTC (permalink / raw)
To: alsa-devel; +Cc: linux-kernel-cn
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.
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: Recording sound from microphone isn't good working that playback sound is distortion.
2012-07-31 7:00 Recording sound from microphone isn't good working that playback sound is distortion Xiaoyong Wen
@ 2012-08-04 0:10 ` Mark Brown
0 siblings, 0 replies; 2+ messages in thread
From: Mark Brown @ 2012-08-04 0:10 UTC (permalink / raw)
To: Xiaoyong Wen; +Cc: alsa-devel, linux-kernel-cn
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.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2012-07-31 7:00 Recording sound from microphone isn't good working that playback sound is distortion Xiaoyong Wen
2012-08-04 0:10 ` Mark Brown
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