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Re: PCI 2 I2S interface existing?

Posted by kls on January 29, 2007 at 01:22:41

In Reply to: Re: PCI 2 I2S interface existing? posted by audioengr on January 28, 2007 at 16:16:06:

What I figured out by myself:

My USB DAC works really fine after tuning my PC for best performance
under Linux, but it is obvious, that as soon as I change conditions/parameters at the PC, such as not playing out of RAM, the sound dramatically changes.

Even if my Tent-precision-clocked PCM2707 buffers three 48kHz stereosamples, my sound changes heavily when changing the input stream parameters, even though I am not getting Over-/Underruns!

The only solution I see is a rather perfect masterclocking in front of the DAC slaving all other parts of the chain.
With USB this is impossible. With SPDIF and soundcards providing
clockinputs on wordclock basis this would also be possible to a certain extent.
Though in this case you'd have numerous stages in the chain, which
most probably mess around with the stream.

Recklocking is another issue. I don't trust recklocking very much unless there'd be perfect buffer management in front of it.

That's why I am after a PCI 2 I2S solution. My DAC Master clock slaving a simple Fifo on a PCI card. Shouldn't be too difficult.

Cheers

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Analog Engineering Associates

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