Archimago wrote: > Hey, just adding a comment about an interesting ABX test result rather > than general comment on ABX as you and Arny have been discussing! > > The 16/44 vs. software upsampled 24/192 test is -very different- from > the jitter one! When did I imply that my comments on the Babyface has > any bearing on the jitter test to make the "conjectures... threadbare"? > Please, do not generalize my comments to something I said nothing about! > > The jitter test is about an original signal vs. one that has been > distorted by simulated *1000ns p-p jitter* (correct me if I'm wrong)! > That's 1 microsecond! That amount of jitter is IMMENSE and the idea that > someone with good ears can ABX that is certainly not terribly > surprising. Realize that the Transporter has a measured jitter of > <300*pico*seconds. In a pure sine wave, I bet most of us will not have > trouble with simulated 10ns sidebands using good equipment.
You are correct - I shouldn't have generalised your comments - apologies. The Jitter ABX testing is not done on just one file which has 1000ns p-p added jitter - it includes a number of such tests on files with progressively lower simulated jitter levels & on some files imported from a pro-audio site purported to have 6ps of simulated jitter. See '-*this post*-' (http://www.head-fi.org/t/668878/jitter-correlation-to-audibility/165#post_9838363) where he shows a relatively positive ABX result - Total: 10/12 (1.9%) on two files path30n versus path30jr. Which generate the comments "That is a really excellent result, the difference between the files is always less than -90.3 dBFS (= 1 LSB in 16-bit resolution), except for a low level "click" at the end of the file, and only rarely has peaks above -96 dBFS." Anyway, the point of posting these ABX tests was his detailed description of the training, focus & testing technique needed for a successful audible differentiation - it was not about what the results signify or don't signify. ------------------------------------------------------------------------ jkeny's Profile: http://forums.slimdevices.com/member.php?userid=35192 View this thread: http://forums.slimdevices.com/showthread.php?t=96407 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
