add spdif input to player

[Marcelinho]

Any projects out there that ads a spdif input to a dvd multi format player or cd player.

[SoNic_real_one]

What's the point? Ususlly the better DAC's are found "outside" of the players. And they already have SPDIF inputs as a minimim.

[Marcelinho]

There are very competent dac's in players available.
Reduce the number of aparatus and cables, maybe save some money, keep myself busy

[SoNic_real_one]

You need a regular SPDIF receiver (WM8804, DIR9001, etc) to generate the MCLK, BCLK, LRCLK and of course DATA. Intercept the I2S inputs of the DAC and use a switch to comute between the internal signals and the ones generated by the SPDIF receiver.

[Marcelinho]

I was hoping for a small pcb already somewhere available commercial or diy.

[abraxalito]

Very unlikely to be available for a DVD player - these use video-derived master clocks (27MHz springs to mind) which won't be easily produced from an SPDIF receiver chip.

[SoNic_real_one]

What??? That makes no sense.
The external SPDIF signal it is what it is. The 44.1 or 48 or 96kHz sample rates are what they are. It doesn't matter what is the clock that is planted in the player - the existing dividers take care of that.
DIR9001 or CS8416 don't need any external xtals or clocks, they don't care how the signal was created.

Originally Posted by Marcelinho

I was hoping for a small pcb already somewhere available commercial or diy.

Look into this:
http://www.twistedpearaudio.com/digital/cs8416mux.aspx

[abraxalito]

Originally Posted by SoNic_real_one

What??? That makes no sense.

Likewise your response makes absolutely no sense to me

<edit> I realised I could make my writing a little less terse. For example I said 'video derived' which is a bit ambiguous, so I'll clarify that by saying its better as 'video standards derived'.

[SoNic_real_one]

So if the main clock is derived from a 27MHz you cannot use a SPDIF receiver?
You imply that somehow that 27MHz changes the samplerate of the signals that arrive to the DAC? Really, what has to do the 27MHz video clock with the problem posted? A chip like SM8707 generates all the clocks in a regular DVD player.
Anyway what I am suggesting does NOT require any connection to the original clock. The i2s derived from the SPDIF receiver needs to be completelly switched (all the signals) at the DAC input.

[abraxalito]

Originally Posted by SoNic_real_one

So if the main clock is derived from a 27MHz you cannot use a SPDIF receiver?

Nope, that's not what I said. Just said its not so easy.

You imply that somehow that 27MHz changes the samplerate of the signals that arrive to the DAC? Really, what has to do the 27MHz video clock with the problem posted?

Please explain how you arrived at that in your thinking and I'll explain your faux pas.

A chip like ...

The DVD players I have have no separate chip to do that - its all integrated. On the outside there's just the 27MHz XTAL - to make the DACs play out correctly an SPDIF locked 27MHz would have to be fed in in place of the XTAL. On my super-cheap players there's no way to get data in to the DACs as they're on the single chip solution too. I do have a Pioneer DVD player with separate BB DAC chips though.