[Laurence Payne]

On Mon, 21 Aug 2006 16:09:52 GMT, "dave" wrote:

The problem I am having is that the audio in the track/tracks where the
voices are recorded has a severe 60 Hz hum over top of it.

Check the hum is actually on the tape. It might be coming from the
recorder, either from an earth loop or because an old machine has
dried-out capacitors or another fault.