wayne325;558637 Wrote: > The cross product between jitter and communications channel duplex type > is exactly equal to 0. I can just as well make > an extrememly low jitter simplex comms channel as I can make a highly > jittered full duplex channel. > > Also, simplex channels need not be > synchronized. The world is chock full of chips called asynchronous > source rate converters that perform exactly the function of destroying > or > creating output data to adjust the input data rate. There is nothing > which compels the output of such devices to have high amounts of > jitter. > > And... I know all about sending source clocks from a DAC to a > transport > in order to reduce jitter. Much, much better than most. In fact, I > believe > I'm still the only person on this board who has designed his own DAC to > do > exactly this. However, I reiterate that sending the clock in this > manner > to the transport does NOTHING to reduce jitter inherent in the system. > All it does is get rid of the SRC. The jitter is up to the DAC > designer. > That is, I can just as well make a high jitter clock-looped system as I > can > a low-jitter SRC-type system.
By feeding the clock back you eliminate clock drift between the two components allowing a small reclocking buffer to eliminate jitter from the source. If you have a reclocking buffer unless you have the clock fed back or some sort of hand shake your buffer will underflow or overflow. I can do this between my Meridian (DAC) and Transporter. Problem is it's a chicken or egg problem as to what rate the Merdian DAC should run at based on the source file I'm playing. Ugh. I'm sure one could design a low jitter one-way and a poor jitter two-way setup. But the best way is two-way with rebuffering. This essentially just moves the jitter problem into a signal box that can be better managed with one accurate master clock. -- mswlogo XP > Cat5 > Transporter/DuetController > SPDIF > Meridian G68 > DSP6000, DSP5500HC, DSP5000 XP > Cat5 > SB3 > SPDIF > Meridian DSP5000 XP > Cat5 > DuetReceiver > SPDIF > Meridian G91 > DSP5000 'My Transporter Setup' (http://forums.slimdevices.com/showpost.php?p=350741&postcount=45) 'Hitch Hikers Guide to Meridian' (http://www.meridianunplugged.com) ------------------------------------------------------------------------ mswlogo's Profile: http://forums.slimdevices.com/member.php?userid=9090 View this thread: http://forums.slimdevices.com/showthread.php?t=79677 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
