In reply to:

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For various reasons, I need a nice and simple piece of software which will do conversion from MPx (2 or 3) to WAV (PCM, 44.1KHz, 16 bit). I don't need anything fancy - ideally it should be drag and drop (if Windows) or command line (Lin/Win) and default to putting new files in the same directory as the existing ones with the same filename (but different extension, obviously).

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 outfile mpg321 -w outfile (file|URL|-)

#!/bin/bash

#untested!

mpg321 -w `basename $1`.wav $1