I discovered recently this technique for recovering audio data from MultitrackStudio .edit files. Please note that this technique applies to audio originally recorded as 24-bit stereo @ 44.1kHz .WAV. Also, the resulting recovered audio file is now reduced to 16-bit and may contain some extra "noisy" samples at the beginning. But this is better than no audio at all.
1) Copy the .edit file to a new location (in case you make a mistake you won't ruin the original .edit file). A new folder is a good location to avoid confusion with the original folder containing the original .edit file.
2) Run GoldWave ( fully functional shareware from http://www.goldwave.com/ )
3) Choose "Open as..." from the file menu. Navigate to your new .edit file copy and select it. GoldWave will now ask you to specify the file format of the audio file since it is considered headerless (containing no identifying format information)...
Choose the following:
* Format: PCM
* Attributes: 16 bit stereo, signed
* Rate (Hz): 44100
4) Choose Save As... from the file menu and save as a .WAV file. Select "Wave (.WAV)" from the drop down menu in the Save As... window.
Now you should have a 44.1kHz 16-bit stereo .WAV file with the audible sonic contents of the .edit file. As stated before, this new file will most likely contain some extra samples (of "noise") at the beginning. This is due to the assumed situation that the .edit file format does in fact contain a header, but it is now being treated as raw audio data instead of as a file header.
Cheers! If you try this out, please let me know how it works out.