nicolas75;572861 Wrote: > Well, what makes me think it wouldn't be that hard to cheat you, is that > you seem to believe that the difference between high and low resolution > file is what's happening above 22 Khz. >
Not at all. I never said that. I was simply pointing out that a high-rez (>16/4) recording should by definition NOT have a brickwall filter killing everything above 22K. On a few older recordings and most modern ones (but not for almost anything digitally multi-tracked in the 80's!) there would be some musical information above 22k - not much, but some. nicolas75;572861 Wrote: > > I'am sorry, but I am convinced that what is above 22 KHz has almost no > importance as far as sound quality is concerned. > I don't disagree and never said otherwise. nicolas75;572861 Wrote: > > I am quite sure I couldn't hear the difference between a real high > resolution 24/96 file, and the exact same file where everything above > 22 KHz is suppressed. > I still call it high resolution 24/96 file, and I doubt you can easily > hear the difference (I mean listening to it, not looking at the > spectrum ...) > I don't disagree and never said otherwise. That's why you would need to pitch-shift it to make sense of it. nicolas75;572861 Wrote: > > So a high resolution file is certainly not defined as a file with high > frequencies (above 22 KHz) content. > > (Ok, 16/44 file cannot have those frequencies, and 24/96 can, but a > real good high resolution file would still have high resolution > quality, even without anything above 22KHz) > I don't disagree and never said otherwise. nicolas75;572861 Wrote: > > For me, the real difference between high and low resolution file, is > that samples have 24 bits versus 16 bits. > That is the real difference as far as sound quality is concerned, and > that has nothing to do with high or low frequencies. > Transforming a low resolution file in a high resolution one is > everything but simply adding information above 22 KHz ... > > And if I would want to cheat you, I don't know exactly what I would do, > I never really thought about that, but I would certainly not use such a > simple process than the ones you suggest ... The point is what most people think, not what you or I think. Most people who cared/were interested would look at the frequency spectrum as it is extremely simple to do - they would see high frequencies and be satisfied (or deceived, depending on what is up there). I was just pointing out that such a tempting method of deception can be uncovered. So, does a 16/44.1 file converted to 24/44.1 sound different to you? - could you tell it from a 24/44.1 original? The real benefit of hi-rez is in the recording and mastering. Everything is keep to the highest "quality" possible until the very last moment prior to release of the final product. This means that all of the tracking/mixing/production/post-production is done in such a way that the potentially deleterious impact of the many DSP algorithms that will be applied is minimised. Even if finally downsampled to 16/44, some of that benefit is retained. Downsampling to 24-bit retains even more of it. To prove your point - which I have never disagreed with! - try listening to the Beatles 24-bit USB releases (24/44.1) compared to the DIRECT equivalent 16/44.1 versions on CD. The 24-bit versions sound slightly "better" (assuming you have a 24-bit DAC...). So here is the conundrum: If a studio takes a 16/44 master, simply converts it to (say) 24/48 and sells it as "high rez" then they are cheating. Not only that, but it will sound identical to the 16/44 version. Audiodiffmaker can spot the difference (or rather the lack of difference!) easily. There's no way to hide it. However, a true hi-rez comparison (such as the Beatles example) will show a different result in ADM and will sound different. -- 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) - 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), 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=74688 _______________________________________________ Touch mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/touch
