2011/6/24 Sune Mølgaard sune@molgaard.org:
Raymond Yau wrote:
Does the noise appear when you increase "Front Mic Boost" control from 0dB to 30 dB ?
arecord -v -f CD -Dhw:CARD=Intel | aplay -v -Dhw:CARD=Intel
Those commands give
aplay: main:660: audio open error: Device or resource busy
and thus no sound. I have played around with Front Mic Boost, though - it doesn't seem to alter the level of noise.
Which asus motherboard are you using ?
Do your computer chassis have a HD compliant front audio panel ?
I cannot find any situation which "Noise" appear in Front Panel HP only and does not on rear panel jacks for my ad1988a
I guess you have to check the front panel connector and Front Audio Panel
There are "click" when I change "Beep Playback Volume" and "pop" when unmute "Beep Playback Switch" in alsamixer on both HP jack and rear panel jacks of my ad1988
aplay -D pulse --period-time=500 48000Hz.wav
Playing one instance of aplay at minimum period time just cause CPU go up to 20% and the sound is still good
However sound is distorted after you play another instance of aplay at the same time
aplay -D pulse --period-time=500 44100Hz.wav