PhilNYC Wrote: > > My Dodson DA-218 DAC does the exact same thing. In fact, it buffers > the input, upsamples AND oversamples it up to 768kHz, buffers it again, > and then re-clocks the signal just before feeding it to the DAC chip > with a clock that is spec'd at +/- 2 picoseconds. And despite all of > this, it is *still* sensitive to jitter in the input signal. I had my > Sony S7700 modded twice, both times the mods were targetted primarily > at improving the jitter, and both times resulted in significant > improvements in sound. How and why? I have no idea. I've talked with > a number of engineers, and most have offered up that any Phase-lock-loop > (PLL)-based design will be affected by jitter in the input signal, and > the only real way to "solve" the jitter issue is via a Master-Slave > distributed clocking system. > Yes, I'd agree with that. Or improve the DAC and leave it close-coupled to the SB transport of course ;-)
Here's some recently made J-test measurements, of the S/PDIF coax signal with a standard SB3 and our SB2+. The comparison (rather than the absolute numbers) is interesting - the SB2+ is lower noise across the board, particularly around the test-tone 'spike'. IME, this translates to an audible difference with any external DAC. http://www.at-view.co.uk/sb2_jitter.htm -- Patrick Dixon www.at-tunes.co.uk ------------------------------------------------------------------------ Patrick Dixon's Profile: http://forums.slimdevices.com/member.php?userid=90 View this thread: http://forums.slimdevices.com/showthread.php?t=21628 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
