Louishlomador;497315 Wrote: > Hi Guys, As the original owner of this post, I have read through some of > the technical measurements Phil and others have come up with. Would we > all say its fair to say that the reason we are having these discussions > is because there may be too many factors to consider when doing these > tests? such as type of sound card being used for the measurements, type > interconnects, as they all have different characteristics, Whether > diffmaker has been installed properly on the respective PCs. The list > could be very lengthy here. > > > I have taken some time to do some research on codecs, file formats. It > seems some codecs do a better job than others. Everybody agrees without > a doubt that the flac files are identical to wave, in terms of what > information each file holds. There is absolutely, without a doubt that > the CD converted, whether in FLAC or WAV is the same as the original > source. As we all agree with this, lets move forward, what else could be > the reason why some can tell the differences, others cannot? > > My question to everyone is what version of codec software was used in > the firmware, when using squeezecenter 7.2. I'll tell you why I'm asking > these questions. I recently converted a few of my CD's to AIFF which is > the wav file version of apple. Strangely AIFF will play in native mode > for 7.2. Unfortunately it doesn't work for 7.4, 7.4.1, or even 7.5. It > only plays for 7.4, 7.4.1 or 7.5 when you have "flac/SOX" turned on. It > doesn't play natively. Bandwidth is not an issue for some of us, hence > we want the full spectrum of the file streamed naturally, not converted > to FLAC by the decoder. Why does 7.2 work perfectly and all other > versions I have tested doesn't? > >
Louis, The reason we are having these discussions is that various people have asserted that there is an audible difference in wav vs flac playback. As far as I am concerned this is untrue for SPDIF playback. There is NO difference - none. In ADM you simply cannot get an accidental null >100dB. With analogue playback it is harder to be absolutely sure because of the clock issue, however my tests and listening lead me to conclude that the same is true. If I am following your thinking correctly, you are now looking at the codec that does the translation of flac or wav into PCM before tcp/ip transmission to the SB? Clearly these codecs works perfectly otherwise the diff tests would fail... and DTS and HDCD replay would fail too. wav-pcm and flac-pcm are both LOSSLESS transformations. There is no ambiguity or doubt here. The unfortunate fact that AIFF will not play natively post 7.2 has no bearing on any of this. There are only 2 factors in play, the bits and the clocks. The bits are always the same - can we agree on this?. The clocks only come into play at the spdif transmitter/receiver and/or DAC. Codecs don't know about clocks. -- Phil Leigh You want to see the signal path BEFORE it gets onto a CD/vinyl...it ain't what you'd call minimal... SB Touch Beta (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 Kitchen Boom, Outdoors: SB Radio ------------------------------------------------------------------------ Phil Leigh's Profile: http://forums.slimdevices.com/member.php?userid=85 View this thread: http://forums.slimdevices.com/showthread.php?t=71321 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
