You can also do this with Quintessential Player (available at [Link](Mouse over link to see full location)). Add the file to the playlist, then right click on it and choose Convert > Convert Selected to > WAV (and other ACM formats).
If you can't download anything, you'll have to record the sound onto a new .wav file.
First, go to Volume Control > Options > Properties > choose "Recording > Click "OK" > Check the box next to "Select" under "Wave out mix".
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