Eric Seaberg;238845 Wrote: > So you have a D-to-A converter than has a wordclock output? Haven't > heard of that one.
That's the whole point of it! You are thinking of a very different application of the concept. > You may want to listen to the analog output of the Transporter on its > own before going through all of the hassle. I'd agree with you there. > > I did some major testing of our ProTools HD rigs (4-studios) comparing > the output jitter when they were running on INTERNAL clock or having to > sync to an EXTERNAL clock. The output jitter was considerably LESS when > run internal. That's correct, jitter is always lower with an internal clock. That is why IF you are using an external DAC, you ideally want the DAC to have an INTERNAL clock, and then send its clock signal out to the data source's clock input. Then the data source device is acting _only_ as a data source, not a data + (poor) clock source. > > We only run our studios using a house wordclock source when we need to > do realtime digital transfers between studios. Otherwise, they all run > on their own internal clock. Of course all of the digital gear in that > room is locked to the ProTools master clock. That is the right way to do it, but what you're describing is more properly called "house sync", even though it can use the audio word clock frequency. It is a different application that has nothing to do with reducing jitter. Indeed, as you say it would make it worse, which is why a word-clock-derived clock signal should never be used to drive a DAC. -- seanadams ------------------------------------------------------------------------ seanadams's Profile: http://forums.slimdevices.com/member.php?userid=3 View this thread: http://forums.slimdevices.com/showthread.php?t=39770 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
