intel8x0 dual codec issue

[Ron Cococcia <ron.cococcia@request.com>]

Hello,

I'm having a little trouble with a dual codec setup that I am using. 
The motherboard has an Intel 815 chip (82801BAICH2).  The motherboard 
has the primary (00) codec, which is an AD1885.  A secondary (01) codec 
has been added over a CNR connector.  This one is a CS4299.  The 
secondary codec uses the timing values generated by the primary.

I had been hearing some distortion in the audio.  It was quite 
noticeable.  Using a wav file of sine waves that has different 
frequencies (440, 880, 1760, 3520) at 44100Hz, I could see that there 
was some jitter on a scope.  As the frequencies went up, it got worse. 
I then created another test file with the same frequencies, but sampled 
at 48000Hz.  Playback of that audio was extremely clean on the scope.

Looking into it more, I noticed that the PCM front DAC (ac97#1-1) was 
not adjusting itself to the appropriate frequency.  The DAC on the 
primary codec was switching between 44100Hz and 48000Hz when I played 
the different samples.

I'd like to have the secondary codec reflect the output rate that is 
being sent to it.  How might I get it to do this?  Is it a bug (should 
the codec front DAC on the secondary codec reflect the appropriate 
frequency?), or how is it intended to work?

Thanks in advance,
Ron


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