adamdea wrote: > Archimago > I just attempted to post a comment on your website under the latest > musing- not sure it got through. I just wanted to say that I'm afraid > you may have committed the sin of Kunchur in mixing up the intersample > interval of 16/44 with the inter sample resolution. > when you said > "Note that a 10μs time period corresponds to a 100kHz sampling > rate, and so 5μs is 200kHz sampling (in contrast, CD 44.1kHz is > 22.7μs)..." > well not really, it only corresponds with the inter sample interval, but > so what? > > The time resolution of cd is about 60 picoseconds (1/(44,100 *2^16* > 2Pi)). Kunchur is just wrong about this and his experiment shows nothing > about the need for more than 16/44 even as a matter of theory. WE have > to keep reminding ourselves that sonic events occur over time. I don't > think you could make a sonic event start -and- stop within a 23 > microsecond period if you tried. So measuring the amplitude at the > sample intervals is enough to tell you what happened imbetween. > Of course I agree with what you say under > "Does this suggest then that we need at least 100-200kHz sampling rate > digitally to ensure we capture everything?", but in truth the supposed > problem just doesn't even get off the ground. I'm no expert of course, > but this was comprehensively explained by JJ over on HA at the time. > > I should stress that I'm a huge fan of yours and very grateful for your > efforts, but I just thought it might be worth tidying up what you say > there.
Thanks Adam and Julf. I shall amend the posting to make sure we remove the concern! Certainly would not want to propagate error. Good point about the impossibility of sonic events as instantaneous phenomena. Archimago's Musings: (archimago.blogspot.com) A 'more objective' audiophile blog. ------------------------------------------------------------------------ Archimago's Profile: http://forums.slimdevices.com/member.php?userid=2207 View this thread: http://forums.slimdevices.com/showthread.php?t=104401 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
