Every now and then it happens that interference noise has crept into an audio recording. Classics such as the creaking of a chair during a violin solo, the cough of a member of the audience during a most beautiful choral passage, a low-frequency rumble on a piano recording, or smacking noises and clicks in audio recordings are all unwanted conditions.

Many of these problems can be removed or at the very least improved upon through audio restoration and by proper utilization of the appropriate tools.