DeVerm;344210 Wrote: > > What I meant by that is the last sentence in the 3rd paragraph in this > link: > http://en.wikipedia.org/wiki/Analog_sound_vs._digital_sound#Main_differences > It says: " As of 2008, all audiophile and consumer grade digital > systems now encode the clock (which if independent from the bit stream > is the source of jitter) into the coded data itself." > > This would eliminate jitter for good as you can even use asynchronous > transmission without having timing problems.
I'm not entirely sure what they mean there, but essentially all audiophile and consumer digital audio interfaces are S/PDIF, which is synchronous, with the clock reconstructed from the data signal. So jitter remains a problem. The only exceptions I know of are the squeezebox family :-). > Another method that's used by some DAC's (no source but I read it > somewhere) is re-sampling the incoming data... basically what you do is > remove timing issues. That doesn't necessarily remove time issues completely. There's always the problem of average source and DAC clock speed mismatch. > An imperfect square-wave, like with rounded edges as we see on those > scope-photo's will cause timing-issues on level-triggering. But this > isn't used here, we do edge-triggering. The target for the "point of > trigger" is halfway up the up-going slope. So if done reasonably well, > a rounded corner is way above or below that point and should not cause > problems. If the slope isn't vertical you would get bigger problems. Rounded edges and non-vertical slopes are more or less the same thing. Suppose (as is claimed in one of those articles) standard Toslink law-pass filters signals and 6 MHz or something. When you put a square wave through a filter like that, you get something between a square wave and a sine wave with some extra wiggles. Corners oscillate and round off, and rising edges are no longer vertical. > about the Glenfarclas: yes, that's the one but make sure it's the 15yr > version. They also have the "101" at cask strength but we rate it well > below the 15yr ;-) What's it like? I've never had it... is it smoky? -- opaqueice ------------------------------------------------------------------------ opaqueice's Profile: http://forums.slimdevices.com/member.php?userid=4234 View this thread: http://forums.slimdevices.com/showthread.php?t=52817 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
