ar-t;398534 Wrote: > This s/w has spurred heated debate on other forums. While it does have > some merit, I have doubts to its usefulness. From what I understand, > (and I could be wrong, so correct me if I am), the result generally > consists of signal that is X dB down from the reference signals. > > OK, let's say that you get a result that is X dB down. How far down > does it have to be to be considered inaudible? Maybe one could claim > that down to the noise floor would be sufficient. Possibly. But the > fact that differences exist can not tell us how these differences will > actually be perceived. > > While I consider it something that has merit, claiming that audio myths > has been dispelled is a bit of a stretch to me. I think your observation > that on your DAC a lot of "myths" could not be heard may merely reflect > that your unit is able to handle the real-world problems that do exist. > Again, not the same as being dispelled. > > Pat
Pat, I take your point that this is ALL in context of my own system and can't be expanded to a general case - that's why I've been urging others to try it. I haven't seen any debate on this software on other forums - at least not for a year or so...do you have any links? NO ONE SHOULD TAKE MY RESULTS AS ANYTHING OTHER THAN "MY RESULTS" - the thread title was a bit of a joke, really :) In general there are three classes of result that I am obtaining: 1) very low level signal in the range -75 to -93 db with no "music" just noise 2) lowish level signal -60 to -40 dB with traces of the music clearly audible when boosted but still below or around the level of the noise floor 3) -30dB ish signals which need no boosting to hear the original track Type 3 is usually what you get when comparing different versions of the recording - say mp3 vs wav... to be expected and not especially interesting except I wanted to hear what MP3 compression was actually removing. Turns out that the answer is highly signal dependent, with rock/pop suffering the least and classical the most. I think this correlates with most peoples expectations and experiences... Type 1 I think is in the "mythbuster" category. If the only difference is white/pink noise at -90dB I'm personally going to call that inaudible. So, for example, changing the coax spdif cable or going from coax to toslink in my system gave this result, as did changing the SB power supply. If I really have to start worrying about -90dB signals, I'm going to worry about the internal temp of the resistors in my amps! Maybe that's why my system sounds better in the Summer? Type 2's are interesting as they should be audible. I'd expect to get these when testing analogue interconnects as they can change the frequency response(I haven't done that sort of test yet). The only discussion about this software I found on the net is pretty old and seems to refer to an earlier version. I see the author presented a paper to the AES late last year - anyone read it? Regards 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=60041 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
