> M4A/AAC is a lossy codec, just a different one from MP3. It's not > lossless. If you want lossless encoding, you'll want to use something > like FLAC. But unless you've still got access to the original > uncompressed audio, I guess the damage has already been done.
Actually, no:
http://en.wikipedia.org/wiki/Apple_Lossless_Encoding
It _is_ similar to FLAC wrt to compression ratios, but it's supported natively by iTunes and iPods...
You are mixing up things
AAC is a lossy codec, Apple Lossless is not AAC and is lossless.
iTunes uses the same file extension (.m4a) for both formats but you can see on the file size
that AAC files are much smaller, i.e. a lossy codec.
A 6 minute AAC song migth be something as 6 MBytes, the same in lossless format around 40 MBytes.
Summing it up: . .m4a files migth be lossless or not.
Steve
-d.w.
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