Discovered with some more troubleshooting that the hum IS there in the sequence, but only if you monitor through the computer speakers. The student was monitoring through the firewire device (a DVPro deck) and there doesn’t seem to be the hum there.
I’m having problems with Compressor. Can’t export directly to it, we get a write privileges error. Have to export a quicktime with ‘current settings’ and then take that into Compressor.