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What is the algorithm to convert an mp3 file to a wav file?
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Drag or upload MP3 files to the encoding queue. Select WAV from the Format and Presets drop-down list of the file in the queue. Choose the desired file or files in the queue panel and select Edit › Export Settings to adjust any settings. Start the queue to encode the MP3 and export your new WAV file.
What happens when you convert an MP3 to a WAV? Nothing. All of the sound of the mp3 will be there in the . wav file when you convert it as you are decompressing the mp3 to a lossless file - .
It's non-trivial to say the least. You could get an overview of the algorithm here:
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.26.5956&rep=rep1&type=pdf
But I would suggest using a library for your programming needs, for example:
http://www.ffmpeg.org/
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As for the mp3 file, I can offer you mpg123 .net wrapper that is extremely easy to use - you will get the sample for reading the mp3, extracting PCM information from it (this is main part of WAV file - PCM data for the sound).
Please, go here:
http://sourceforge.net/projects/mpg123net/
and download sample code from here:
http://sourceforge.net/projects/mpg123net/files/
Ping me if you need more info/help on the subject.
As aac files are concerned, there is faad project here:
http://www.audiocoding.com/faad2.html
that enables you to do the same with the aac file. If you need .net wrapper, I'm about to put it on sourceforge also.
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