mswlogo;193517 Wrote: > Most decent external DACs and preamps have a Dejitter circuit. Basically > a small memory to store the stream as it arrives (just like a computer > capture device). It then pumps that buffer out on a new clock for > internal use (e.g. a DAC). That is, it records it to storage and the > plays it in real time.
Actually, its a lot harder than that, which is why most DACs don't do a very good job of this process. Simply having an intermediate buffer doesn't get you anywhere because the incoming and outgoing clocks will never be quite synchronised - and in SPDIF there is no "hurry-up/slow-down" mechanism for the receiving device to control the input flow. There is one foolproof way of doing this, of course, and that is to have a large enough buffer - in extremis, an entire CD's worth - but generally users don't wait to wait even a few seconds before having sound come out. There are some clever techniques available but they are far from simple and not widely used except in the more esoteric kit. Anyway, this is all going somewhat off topic (should really be on the Audiophile board!). Fact remains that your experiment doesn't prove a whole lot except that bits get from A to B over SPDIF links. Doesn't help anyone decide whether to use one link rather than another, or to get a Transporter, or a digital mod for an SB... IMHO. Ceejay -- ceejay ------------------------------------------------------------------------ ceejay's Profile: http://forums.slimdevices.com/member.php?userid=148 View this thread: http://forums.slimdevices.com/showthread.php?t=34292 _______________________________________________ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/discuss
