Wave Repair has a set of filters with adjustable frequencies and bandwidth.
High-pass, low-pass and notch filters are available. These can be used to
eliminate specific frequency ranges. For example, a suitably positioned
notch filter can
be very effective at removing hum while losing very little of the music.
Up to three filters can be cascaded together in one pass, and there is
a realtime preview mode to allow you to listen to the effect of adjusting
Example Screen Shots