opaqueice;187020 Wrote: > Actually this might be very very misleading. > > You're subtracting two signals in the time domain. The resulting > signal is determined by all sorts of things which have nothing to do > with audible differences. For example, suppose the signals are > slightly mis-aligned in time. In that case the difference will be > large even if the files were otherwise absolutely identical. If the > mis-alignment is small, the difference will be almost all in the > high-frequency domain, as you are seeing. >
I wondered if there might be a problem like that. To check it, I made up another example. This time I've included 320Kb, 128 Kb and VBR as well as a 56Kb MP3 of the original so you can hear approximately what the original sounds like (it's Wolfstone's "Tinnie Run" - 15 second guitar riff then lots of drums and acoustic guitars). I also included a screenshot from Audacity zoomed right in to the sample level on one peak on the original and each of the three encoded/decoded files. I'm no audio expert, but they sure don't look like they are out of sync in the time domain, but I can see subtle differences in the waveforms. I didn't do anything to them other than load them up in the same project then zoom in. The files are all here, with filenames that should be self-explanatory: http://qqqq.ca/files/audio-comparison/ -- joatca SB3, NAD 3020, Mission 762i's ------------------------------------------------------------------------ joatca's Profile: http://forums.slimdevices.com/member.php?userid=10387 View this thread: http://forums.slimdevices.com/showthread.php?t=32576 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
