SoftwireEngineer wrote: > Just saw this post from the person arguing jitter is not audible in that > quoted link - "Folks, all anyone has to do to convince me that a typical > amount of jitter is ever audible is to post a Wave file proving the > point! ". Complete ignorance of what jitter is. He is arguing with a > technical person without doing some home work hmm..
I've been trying to wrap my head around this over the years as well and am wondering if there's anything wrong with what he's proposing. Firstly, since correlated jitter rather than random jitter is generally accepted as more problematic (since random jitter will sound like low level noise reducing effective dynamic range and likely not too bothersome unless truly heinous), one should be able to at least theoretically model it based on the sidebands as the debaters noted and showed in graphs. In fact, Stereophile Test CD 2 released back in 1992 had track #26 where they modeled a 11kHz sine wave with 10 ns jitter sidebands at 7kHz and 15kHz. This track has been generally easily audible for me as I bring it along with me to test gear over the years (ironically except for ONE megabuck system with $$$ Avantgarde horns that started breaking up at 11kHz, all others including my cheap 20+ year old Sony minisystem passed the audibility test). My rationale was that if a system had horrible >10ns jitter, it would overpower the audibility. Given that it's a sine wave, it's much more audible than actual music. Why not do something like this with modeled jitter injected into a Wave file of music and show at what theoretical level the sound is degraded (what Ethan suggested)? In fact here's exactly what someone did: http://hddaudio.net/viewtopic.php?id=63 I didn't read the whole thread again, but I do not believe anyone ABX'ed a difference. They went as high as 100ns injected into it! Hey, if I weren't finishing off with my MP3 test, it might be worth trying something like this. BTW: Do you think "jitter" is a bigger problem in most audio systems than converting to ~320kbps MP3? ------------------------------------------------------------------------ Archimago's Profile: http://forums.slimdevices.com/member.php?userid=2207 View this thread: http://forums.slimdevices.com/showthread.php?t=96407 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
