Re: Multi Delta 1010 sync

[John Rigg <ad@sound-man.co.uk>]

On Sun, Feb 05, 2006 at 04:15:25PM +0000, John Rigg wrote:
> The S/PDIF receiver OTOH uses its own internal PLL which works with 96kHz
> sample rate. However,I couldn't sync reliably using the S/PDIF in/outs with
> one card as master and the other as slave. At 96kHz jackd would die at random
> times with a floating point exception, so often it was unusable.
> At 48kHz this would still happen, but not often (every couple of hours).
> I'm guessing that this is due to a phase difference between master and
> slave clocks.

An update: the floating point exception was a divide-by-zero error
in jackd that only occurred sporadically.
The Delta 1010s sync perfectly well via the S/PDIF in/outs with one card
as master and the other as slave.

To summarize:
Word clock inputs work at 48kHz but not higher due to a hardware
limitation.
S/PDIF inputs can be used to sync up to 96kHz.

John


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