Jan 2, 2007, 07:56 PM
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#1 of 19
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I agree that burnning to CD and then re-ripping to MP3 is probably the way to go for now.
I am aware of an algorithm to transcode MP3 data into AAC while still in the compressed space. Such an algorithm avoids introducing additional quantizer error in the signal, and achieves pretty good results. I am not aware of a reverse algorithm -- to take an AAC compressed signal and convert directly to MP3. This is probably due to the facts that there isn't a whole lot of sense in investing energy deriving a process to conver from a superior codec to an inferior codec, and that MP3 only clearly specifies a decoder scheme, not an encoder.
Chances are, even if you had unprotected AAC files, any transcoding algorithm would simply decode the AAC data to a PCM stream, and then re-encode to MP3. This isn't a whole lot different than burning your AACs to CD and re-ripping them with your favorite MP3 encoder.
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