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Old 11-23-2008, 07:51 PM
Niki Kovacs
 
Default Correctly setting up sound with Intel High Definition ICH7

Hi,

Earlier this day I started a thread about Skype not working with
outgoing sound. Now I wonder if it's not a problem with my soundcard. I
had a vague suspicion about this, but since it's way off the original
topic, I decided to start a new thread about this.


Here's what the soundcard looks like:

[root@grossebertha etc]# lspci | grep -i audio
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High
Definition Audio Controller (rev 01)


Actually plain sound (output) works OK. I can use XMMS, MPlayer, VLC and
the likes without any problem.


On the other hand, when I try to record sound over the soundcard, the
result is quite fuzzy, full of distortions. I tried to fiddle with
alsamixer to get rid of the distortions, but to no avail. Here's what I
did to record sound over the mic:


$ arecord > ~/test.wav

Now in the past I configured a laptop with an ICH sound card on it, a
small ASUS. I spent like whole afternoons googling and searching through
forums, until some day I stumbled over the solution. I had to add
something to /etc/modprobe.conf, something like:


alias snd-card-0 snd-hda-intel
options snd-hda-intel model=3stack

... and all of a sudden sound worked.

Now maybe there is also a magic line for my new machine (a lenovo
desktop PC) that makes the soundcard work correctly for the microphone?
But where do I get that information? Guesswork? Google again for a week?
Searching for "centos intel high definition sound" doesn't show much.


Cheers,

Niki
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