WAV vs. AIFF

Hi Kgturner, so my assertion that timing/jitter is an issue is specious, at best, huh? Perhaps the point was too subtle for you. Perhaps you just aren't good with analogies. Perhaps I explained it badly. My point is that I hear many people make statements as if the issue is getting bit perfect transmission. That is a very limited pursuit. The more difficult pursuit is to preserve the clock information.

You seem also to be a bit confused about error correction. The flac file is tolerant to errors as you point out, but that is so it can play through errors - not what you just said. The wav file is not tolerant of errors and so those errors become audible and will result in periods of noise during playback or for the file not to be playable beyond the error.

The more difficult pursuit is to preserve the clock information.

This is an interesting (and excellent) statement and also something one of the magazines touched on awhile back, I think Stereophile, who did a great article on this, I wish I could remember the issue.

Tell me if I am right, any clock data that isn't right, is what has been labeled "jitter"?

Also, I still go back to what I was trying to stress before and that is these subjective differences can be system dependant, hence why one hears a difference and another doesn't.

Some DACs are more tolerant of jitter than others, some systems might smooth over the aggressive highs created by jitter, or not have the bass performance to expose the woolly bass caused by jitter. Also, the jitter you get with Windows is different from the jitter you get with an Intel Mac. With Windows you lose tightness and resolution, so the sound is hazy. With an Intel Mac the sound is tighter and more resolving but tends towards a bit of glare and aggression. Both can be improved by various means to reduce these issues.

Reduced jitter will sound like a smoother yet tighter and more resolving presentation that is also less fatiguing. These attributes are often thought of as as trade off, but less jitter gives you an improvement in everything.

The differences between flac and WAV or ALAC and AIFF are very system dependent. A powerful PC or Mac will be less affected than a less powerful one. The only problem with flac and ALAC are that it means the computer must unpack the files as well as stream them. Reducing what the computer does while it is streaming is a good thing. You may not hear the difference through eliminating a task, such as unpacking compressed files, but the process of optimising a computer for digital audio duties includes eliminating as many unnecessary processes as possible, and when you do that the cumulative effect is a very significant improvement in sound, in my opinion.