Kyrre Aalerud wrote:
>
> > Or better thought, use a chip that can support higher clock speeds than
> > 20MHz, like the 18f series. I don't quite understand the object of the
> > project though. Do you have a computer that is putting out 5.1 sound in
> > analog that you want to turn into digital? Don't most 5.1 cards out
> > there also have a digital out, thereby allowing you to just use a
> > digital cable to carry the sound?
>
> Wrong.
> There is *no* soundcard on the market that has AC3/ Multichannel output from
> games etc.

Not even the M-Audio 410?

You don't suppose it might have something to do with licensing the
'data format'. E.G. 5.1 digital stream.

> What you refer to as digital out, gives multiple 2-channel outputs, but not
> a single 6 channel one.
> The only time the main digital-out channel gives more than 2 channels is
> when the soundcard is passing a AC3 stream or other multi-channel stream
> from the software.  This doesn't happen in a game.
>
> Whan I want to do is to activate digital out on mu SoundBlaster 5.1 and then
> take those three 2-channel digital outs and combine them into a single
> signal.  This can then be sendt to a reciever the same way as you would send
> a ac3-signal, through a single fibre.

But does the digital out stream have all 6 channels (AC99??)? If it does
then you aren't going to be able to format the data with any available
PIC. 6ch x 48khz x 16bits= 4.6Mbs! You're going to need some sort
of FPGA or similar dedicated hardware.

Sounds like a very marketable solution IF you can get the licensing.

Robert

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