1. I used SoundApp to convert a file on Mini vMac. Aiff, 22050, mono. On a completely separate instalklation of System 7.1 it makes a 'pop' sound and doesn't play.[After conversion]. On vMac of course.
2. I doesn't have a quicktime-capable mac.
3. It apparently converts, but trying to play an aiff results in a system hang up.