Remove background noise, noise in tracks from a FM Broadcast album ?

[ChrisGoes]

Hi all.

I have found a live concert withe clear sound but there is much background noise in in the tracks, i think it is from an old cassette or something. I wonder if i can use "DSP effects" to remove some of the noise when i convert from FLAC to mp3, or if you have another tip...

[kirkkw]

I record speeches using an Olympus digital recorder and at times have problems with steady background noises like an air conditioner. Is there a tool or DSP Effect which could remove noises of this type?

Thanks