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Does mp3 convert to WAV losslessly?, Title is the question
Gainless
post Mar 28 2012, 20:38
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I just wondered if this the case, because actually the Mp3 format is using a lot of of overdrives which is not possible in a WAV file. So if I e.g. make an audio CD with some Mp3's, will they remain exactly the same or will they differ from what an audio player would decode?
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Gainless
post Apr 8 2012, 00:15
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Well, to bring it to the point: Is it possible to do a bit-exact conversion of an mp3 to a WAV file?
If I understood the previous posters right it's not due to the high peaks of an mp3 file...
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saratoga
post Apr 8 2012, 00:36
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QUOTE (Gainless @ Apr 7 2012, 19:15) *
Well, to bring it to the point: Is it possible to do a bit-exact conversion of an mp3 to a WAV file?


As I said before, decoding is an approximate process. There is nothing to be "bit-exact" in comparison to.

QUOTE (Gainless @ Apr 7 2012, 19:15) *
If I understood the previous posters right it's not due to the high peaks of an mp3 file...


Yes, peaks are not really related to MP3, they're more generally a question of how DSP operations are implemented on computers. Any lossy process can introduce above full-scale peaks, and any well implemented DSP process can handle them by using proper precision and/or scaling. MP3 is no different. The player on your CD player could screw it up, or the player on your computer could screw it up. If in doubt, you can always add a dB or two of EQ precut or use replaygain to avoid this whole problem.
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