Convert/Mixdown Stereo Wav to Mono Wav

Hello,
i have a problem with automating Quicktime via Applescript. I´ve got thousands of two channel stereo interleaved pcm coded (aif, wav) audio files that i want to convert to split stereo files, i.e. mystereo.wav --> mystereo.L.wav AND mystereo.R.wav
I found a solution to save a QT-export-settings file with Applescript following these instructions: http://lists.apple.com/archives/QuickTime-Users/2002/Nov/msg00294.html. So this is how i made the export set to MONO!
My idea was to open the stereo interleaved file, set the pan to left, export to mono, then set the pan to right and export again to mono. I automated theses actions with applescript and it seems to work. BUT ...
Unfortunately quicktime exports 2.0 stereo tracks (one channel silent, the other with programme) instead of following the export settings and merge to mono?
Am i doing something wrong?
Why behaves QT this way?
How can i force quicktime to export mono files?
Thanks in advance for your answers.
b.

Not sure about the Applescript part (I am just delving into that myself), but the method I use to output separate L and R channel mono files from a stereo interleaved in Quicktime is as follows:
1) Open the stereo file, bring up the Movie Properties window (Command-J)
2) Click the "Soundtrack" entry in the list, then click the "Audio Settings" tab
3) On the right hand side of the window is a list of Channel Assignments.
4) For your Left channel export, assign channel 1 to "Left" and channel 2 to "Unused" from the pop-up list.
5) Choose "Export" from the file menu, select "Sound to WAVE" or "Sound to AIFF"
6) Click the "Options" button, choose your setttings, and make sure that "Mono" is selected in the Channels setting.
7) Name the file "mystereo.L.wav"
Repeat steps 4-7 for the Right channel (e.g. set Channel 1 to "Unused" and Channel 2 to "Right")
Let me know if you get anywhere with the Applescript, I do this manually every week to separate L and R channels for a podcast I produce, and would love to have a more automated way to deal with it.
-K

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Convert/Mixdown Stereo Wav to Mono Wav

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