Messages in this thread | | | Date | Fri, 28 Feb 2003 03:40:05 +0100 | From | David Monniaux <> | Subject | Asus P4S8X - SiS 7012 audio with C-Media 9739 codec |
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Hi,
I have a SiS 648-based motherboard (Asus P4S8X) with a SiS 7012 AC'97 audio coupled with a C-Media 9739 codec (id 0x434D4961).
For some reason, mixer settings under Linux work in a binary fashion: either mute, or full volume, but no gradation.
I've fixed ac97_codec.c so that it detects the codec, but then I'm stuck. I got the 9739 technical documentation from C-Media's site, but it does not help much - it seems that the values put in the registers are all right.
I suspect some bypass mechanism or some bit that turns analog mixing off, but I don't see anything in the documentation about it.
Would somebody with the same motherboard care to do some experiments? Playing a sample with xmms, one can set volume to "mute", any other value gives a constant volume.
It's also impossible to record anything - the recording is blank.
Regards, D. Monniaux
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