Use one .wav file per tape. This will keep you mindful that Studio Recorder has a size limit on files it can work with. Keep the .wav file size under 2 gig. This translates to the length of each file of about two hours. It can't work with anything bigger than two gig. Also remember that Studio Recorder works with .wav files directly. You can store output in MP3 format, but to work directly with a file as you edit, it must be a .wav file.
Mary Mary