opening/playing .MSV files

Well, .msv appears be from a Sony voice recorder. From what I can find, the software that come with the voice recorder is for Windows only. You going to need to use a Windows computer to convert this sound file to a WAV file. Then Quicktime can import the WAV. Sorry if this isn't the answer you wanted to hear. Sony chose the go the Windows route only.
You can how ever record from the audio out from the recorder to the audio in of your mac.

QuickTime cannot natively play Sony MSV files, and I cannot find any Mac application that can convert that format. Unless you have access to a Windows system - the Sony software reportedly can save/export in other formats - you will probably have to connect the audio output of your recorder to the audio input of your Mac and record the files. There are a number of audio recording applications for Mac that would save the recording an a useful format.

Regards.

Glad you were able to work around the problem.

Cheers.

So for those of us (me!) that don't have the line in cable and are on a deadline, the problem isn't solved.

Any help software wise? I'm in a bind here.

Thanks,

Connor