Stratmangler;397684 Wrote: > Hi Phil > > Thanks for taking up the dirty stick on this one. > > The files concerned were all wav. files. > > I took the fixed level analogue outputs of my DAC (Bereford 7510 > 6/4)into an EMU 0202 USB external ADC/DAC (quieter than the standard > in/out of the laptop). The signal chain was SB3 to DAc via SPDIF to > EMU0202. The source of digital grunge you mention is probably the SMPS > PSU off the laptop used to record the files, although this is, as you > have said, very low down in the noise floor. > > The clock drift is doubtless due to the fact that all files were > recorded in real time - I have since ripped, cut and copied the same > track from CD for comparison purposes (ie direct manipulation of the > waveform), and there are no clock errors in the results of the > comparison between A + B (it is indeed the same file with a slightly > different name). On playback whether via the EMU or via the standard > analogue outputs there is a level of grunge low down in the noise floor > (SMPS grunge ?). > > So we're dealing with very imperfect devices in an imperfect world. > > The reason for going through all of this malarky is an attempt to > obtain totally objective evidence as to whether there are audible sonic > differences between Squeezecenter levels and their associated firmware. > > Subjectively I did not get on with the SQ of 7.3 , but have got on ok > with subsequent 7.3.1 and 7.3.2 . > > And I do not get on with 7.4 beta. > > I ran 7.4 beta for a good few hours, and over a period you adjust to > what you are listening to. > > Then I just got the urge to play the AC/DC song "Highway To Hell". The > harmonic structure of the opening guitar riff was not "right" ! > And trust my ears on this one - my username of Stratmangler is due to > the fact that I've played guitar for years. > I know the sound of a Marshall amp instantly. > The mangler part is self depracating in that I do not put in anything > like the amount of effort to keep my playing skils up to scratch, let > alone improve. > I haven't really had the time or inclination for a good few years. > Anyway, I have digressed.... > > Dig out the CD and play the same track - things back how I remember > them. > > Stick on the vinyl - harmonically fine, how I remember them. > > Play the track from HD via SB3 - things not so good. > > Uninstalled 7.4 , cleaned up, rebooted and clean instal of 7.3.2 and > things fall back into place and sound good. > > The problem with all of the subjective stuff is that it is my system, > my place, and my ears. > > And until either I, or someone else can come up some way of extracting > imperical evidence then this kind of discussion will continue and > doubtless resurface from time to time. > > Many regards > Chris :)
Chris - I saw AC/DC on the HTH tour! - I'll have a LISTEN to that track - like you it is one I know well. Likewise Marshall amps...(although I'm a Tele/LP man myself) Cheers Phil -- 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=56591 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
