Well, the volume control test is proving very interesting! I'd like to hear from SlimDevices on this one - Sean are you there?
I took a 24/96 track via SOX so 24/48 at full volume. Then I dropped the SB volume to 50% and recorded the same track. The difference shows as -48dB which is quite large...but when I played it I couldn't hear anything even with 80dB of boost!!! No rise in the noise floor either! (well there is but its tiny). So I opened up the difference file in Audacity and wow! - now I understand the apparent paradox of a large difference I can't hear... there's a fairly obvious DC offset introduced on both channels. This seems plain wrong to me. I'd really like someone else to try this out! With the volume set to 9 out of 11 (web gui) there is no difference at all (sorry all you "full volume" fans) - and NO DC offset. With the volume set at 3 out of 9 there is the expected rise in the noise floor caused by the lowered signal to noise ratio but the DC offset is bigger than at half-volume! I notice the offset is higher in the right channel. We are talking about nearly half scale DC here! I think I need to take a rest from this for a bit. These results don't seem reasonable. Maybe something is wrong with my soundcard or method? Anyone care to replicate? -- Phil Leigh You want to see the signal path BEFORE it gets onto a CD/vinyl...it ain't what you'd call minimal... SB3 (wired) - TACT 2.2X (Linear PSU) + Good Vibrations S/W - MF Triplethreat(Audiocom full mods) - Linn 5103 - Aktiv 5.1 system (6x LK140's, ESPEK/TRIKAN/KATAN/SEIZMIK 10.5), Townsend Supertweeters, Blue Jeans Digital,Kimber Speaker & Chord Interconnect cables Outdoors: Boom ------------------------------------------------------------------------ Phil Leigh's Profile: http://forums.slimdevices.com/member.php?userid=85 View this thread: http://forums.slimdevices.com/showthread.php?t=60041 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
