iZotope RX 3 is a professional software program for restoring/rescuing/treating audio recordings. If you're dealing with troublesome clips, hum, buzz, crackles, etc., then this is the software for you! The Advanced version also features a number of additional tools for removing reverb artefacts from pre-recorded audio, a dialogue de-noiser module, advanced analysis tools and more.
If you're after a professional audio restoration program, then don't miss this opportunity to grab RX 3 at an amazing price. Throughout April 2014, you can get your hands on RX 3 for just £169 (usually £219) or RX 3 Advanced for just £509 (usually £839).