Just to clarify, ADM (indeed, any "null test for difference") relies on the only thing changing between tests being the thing you are trying to detect.
In particular, ADM can correct very successfully for gain and sample timing differences. What it can't do is to correct for quasi-random cyclical distortions such as "wow & flutter" that are induced by mechanical fluctuations and which distort both frequency and amplitude at points in time... This isn't an issue with hard disk replay (because it is truly identical each time). It's also mostly true of CD, but not necessarily 100% every time, because of error concealment/interpolation. I don't understand this remark: "From an engineering perspective his tests are irrelevant. He is comparing apples and pears." I'm absolutely comparing an unmodded apple with a modded apple... and these tests are therefore very interesting from an engineering perspective, because they detect that something is indeed happening. I can't see how these tests could be made more relevant... but I'm happy to be enlightened. As for the "cumulative" issue... as far as I can tell the effect of the mods is fully commutative, so sequence is irrelevant: 1+2+3=6 3+1+2=6 I could have applied the mods in a different sequence and still ended up at the same final test result. The towel analogy doesn't work because the mods aren't working in "layers", they are working as "slices of a pie" AFAICT. -- Phil Leigh You want to see the signal path BEFORE it gets onto a CD/vinyl...it ain't what you'd call minimal... Touch(wired/XP) - INGUZ DRC - MF Triplethreat(Audiocom full mods) - Linn 5103 - Aktiv 5.1 system (6x LK140's, ESPEK/TRIKAN/KATAN/SEIZMIK 10.5), Pekin Tuner, Townsend Supertweeters, Blue Jeans Digital,Kimber Speaker & Chord Interconnect cables Kitchen Boom, Outdoors: SB Radio, Harmony One remote for everything. ------------------------------------------------------------------------ Phil Leigh's Profile: http://forums.slimdevices.com/member.php?userid=85 View this thread: http://forums.slimdevices.com/showthread.php?t=84742 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
