Fwd: chipsets

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---------- Forwarded message ----------
From: paul blakeley <pblakeley@xxxxxxxxx>
Date: Aug 27, 2007 10:10 AM
Subject: Re:  chipsets
To: Clemens Ladisch <cladisch@xxxxxxxxxxxxxx>


Thanks for replying.

I have installed linux on a number of PCs over the last year or so.
Each PC having a different audio chipset.  Recently I have installed
linux on PCs with the ALC888 and CS4299 chipset.  I was able to work
out the CS4299 chipset basically downloading the chipset block diagram
from the manufacturer.  I am sure I mapped all mixer controls but I
had to guess some mixer controls.  The ALC888 is different though,
looking at the chipset block diagram there are potentially 50 simple
mixer controls.  The alsa mixer has around half that.  With this
chipset I am having trouble capturing from the line-in and mic input.
I can only capture from the line-in.  And even with this the signal is
distorted.  I have a signal analyser : ( Its like this is mic level
rather than line level.  Maybe I need to check my hardware
connectivity.  Can you help?

Anyway I am sure whoever write the drivers must go through the trouble
of selecting which mixer control to choose from the chipset.  I am
sure this information would be invaluable for design, user and debug :
) Thats really what I was originally asking.  Hope this helps.

On 8/27/07, Clemens Ladisch <cladisch@xxxxxxxxxxxxxx> wrote:
> paul blakeley wrote:
> > Can someone tell me how the alsa mixer controls map onto the audio
> > chipset?
>
> This is different for every chipset (and, with AC'97 and HDA
> controllers, for every mainboard).
>
> Could you be a little more specific what your actual problem is?
>
>
> Regards,
> Clemens
>

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