Whether you can tell or not depends on a lot of factors - a proper
double-blind test on studio-quality equipment is required - but that's
only part of the story.

The thing about a lossless storage medium is that you have a
bit-accurate copy of the original. So if, in the future, you have
better gear where you CAN tell the difference, or you want to try a
replay technique, say, for generating surround from stereo and requires
accurate phase relationships, etc, then if you have a lossless version
of the content you will be fine, but with a lossy technique you won't.


In addition, with a lossy technology you can rip things like DTS CDs
and decode them on playback: this requires end-to-end bit-accuracy.

The purpose of a perceptual (lossy) coding technique is to save
space/bandwidth by removing things you can't hear. But "things you
can't hear" depends on a lot of factors. 

By all means make lossy copies for the portable stereo, etc, where
space is really important and you are after portability and convenience
rather than quality, but, I would suggest, make sure you have a lossless
original somewhere - the CD or a lossless rip - because one day you
might just need it. 

--Richard E


-- 
relen
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