WAV vs. AIFF

I have been using my mac mini for about 2 years as my main musical source (all transports GONE :) I did very heavy comparisons of AAC/WAV/AIFF and m4a(Apple lossless) my findings are that while Apple Lossless is very very good, you lose some air and overall dimensionality of the music seems to suffer. I do not use Apple Lossless for my home system, but it is what I use on my iPod touch and on my portable HDD for the car...etc. I keep redundant copies of my music (an A.L. and AIFF version) because HDD space is very very cheap these days.

Now WAV is very good, but after a lot of testing I found that WAV files generated by iTunes (this was iTunes 8.x, not 9 (can't remember the exact version)) do not seem to sound as good as AIFF. I then used a program called MAX which is very very good for doing all kinds of musical file conversions and found that the WAV files and AIFF were virtually indistinguishable.

Currently as stated above I use AIFF, primarily because iTunes tags everything for me. I would say they are about equal but I would NOT use iTunes to create my WAV files. I use a Meitner Bidat for DA duties and the sound is ... :)

I have been told that Apple Lossless sounds just like uncompressed files (even one of the so-called golden stereophile guys claimed this a few years back). I believe the people making the claim believe that, it may be the limitation of their system or their ears, but I can definitely hear the difference. Now in the car...I don't care, I am just passively listening to the music as I also listen to engine when down shifting into 3rd but I digress! Happy Listening!!!

It absolutely is compressed (think about it, if it were not, it would be the same size as the original) BUT..every bit which is removed is replaced when it is played back unlike lossy compression inwhich files never return to the original state and are forever molested. So why might there be a difference in sound? The most obvious reason would be the increased processing which needs to be performed on the file in order to restore it to the original uncompressed format.

It is subtle but it comes across as a reduction in the relaxed nature of the musical presentation. As I stated earlier, when ;istening the car, I am not privy to the effect, but in either of my 2 home systems, I can (on most songs) readily identify the lossless file. I have some songs which I was absolutely unable to hear a difference, but not many. I suggest you perform a head to head test and determine for yourself. It is interesting, one thing is certain, Apple did a really good job with their compression algorithm, but for ultimate fidelity...uncompressed all the way.

Right in so many ways, when the concomitant digital picture is put back together from a lossless compress, it looks just like the original file...but in my experience there is something ineffable which is lost during the 'rebuild' process. B&W making that statement brings to mind Sony's famous "Perfect Sound Forever" and we all know how that panned out LOL!!! I do agree that it would be dependent on the machine rebuilding the file. As I say, A.L. sounds great, just not as good as no compression :) And yes you are absolutely correct that we are still learning quite a bit about digital. I am convinced and have been for about 10 years now that we can hear things which we have not yet quantified, therefor no construct exists to model or measure these properties.

"Brianmgrarcom Wrote":
"Here we "may" see it slightly different. I do believe all the 1's and 0's can be brought back with absolutely no difference."
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Remember that although all the bits are replaced this is being done on the fly, hence processing is taking place. It is not reconstructing the signal and then playing it back all at once. Now I have experimented by taking a m4a file and converting it to a AIFF file and I have to say that does sound better than playing it directly as a m4a file. This is what led me to the belief that it is the processing that may be affecting the final outcome.

I think this was a good discussion and hopefully some of us acquired some useful information :) Love my hobby!!!