stuartewen

I recently got a foot pedal and have downloaded Express Scribe 4.05, for use on a Mac Intel with OSX 10.5. I'm trying to open recorded interviews that I did using Wire Tap Studio with a microphone and some with a Zoom H4. When I try to open the files (all MP3 or aiff) the files appear gray in the browser, not openable. I can open these files using other software, but the pedal doesn't work with these, so I'm left with keyboard play, pause, etc. functions. What is wrong? Stuart