On Tue, January 24, 2017 09:22, Ralf Mardorf
wrote:
On Tue, 24 Jan 2017 07:41:50 +0000, j(a)jrigg.co.uk
wrote:
> On Mon, Jan 23, 2017 at 05:35:57PM +0000, Fons Adriaensen wrote:
>
>
>
>> With the official zita-ajbridge you can disable resampling.
>>
>>
>>
>
> Good to know.
>
>
>
Could this be used without word clock, by using a digital interface
to sync, e.g. S/PDIF? If so, assuming two identical cards would be
used, would sync be hat good, that each combination of IOs, e.g. a
channel from one card for the left and of the other card for the
right channel of a stereo signal, wouldn't cause phasing issues?
yes i think that works pretty good (drawing from earlier
experiments). Using S/PDIF just for sync is a cheap alternative to a
"real" wordclock.
One of both interfaces will be slaved to the other and then both
should run the same cycle at the same time (so theoretically no
phasing issues). You just have to manage to shove forth and back the
sample data from/to interface at good enough rate which isn't a
particular problem on
using UDP like zita does. If there is no
resampling involved, this
can work for many many channels without hitting the CPU too much.
Greetings
Thomas
Even if the interfaces are synchronized with S/PDIF, there will be some
cycles (hopefully a static number) needed to shove data forth and
back. This needs to be considered to effectively get synchronous
behaviour for input or output to both interfaces.
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