I would take a look at the Crystal Semiconductor Products

http://www.cirrus.com/

In the first instance and just use a PIC to control them

Goto http://www.cirrus.com/design/products/index.cfm?DivisionID=3

and look at the applications down the right hand side
for some ideas

Regards
Chris


I have been fondling with the idea of using a pic to parse two stereo SP/DIF
(Actually TTL, but same format :-) signals from a Soundblaster Live card, or
5.1 card.

Creative was simply to cheap to include such horsepower, instead they made
the Live 1024 card with two stereo digital outputs for Front left/ringht and
Back left/right. (And the plug also delivers some power to a output module)
In the 5.1 They did away with the output module power, and added the third
digital channel for the center and subwoofer... Or, so it seems because the
card has two more channels, and the old output module won't work anymore.
I read somewhere that four channel SP/DIF in normal PCM mode is possible, so
the question would be: Who will make something :-)  I just had to take a
closer look at this !

How much power would I possibly need ???

I already know that for each sample, two 32-bit words are transmitted, which
results in a bit-rate of:

    2.8224 Mbit/s  (44.1 kHz samplingrate, CD, DAT)
    3.072  Mbit/s  (48 kHz sampling rate, DAT)
    2.048  Mbit/s  (32 kHz sampling rate, for satellite purposes)

All of theese would be nice to handle, but the Soundblaster only uses 48
kHz...
BUT, if the data is NOT PCM, we shouldn't change it, cause then it might be
AC3 or something.  This should be passed straight trough...

The question is if it can be done, and most of all: with some pic ???

    KreAture

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