LinuxQuestions.org - Sound Problem

There is no problem of playing of sound in my computer but when it comes to recording.

alsamixer does not work giving the following error message

Code:

alsamixer: function snd_ctl_open failed for default: No such device

and amixer does not work

Code:

amixer: Mixer attach default error: No such device

I tried recording with KRecord. It shows that it is recording but the file just recorded is blank, without any sound.

aumix does not have any problem and I can control the playback volume but in aumix there is no bar for adjusting the left-right balance of the microphone.