ClickRepair for Mac OS X 3.5.2 B43c

ClickRepair finds and repairs clicks and crackle in audio files obtained by capturing vinyl and shellac (78) records to digital CD format. It is not a filter; it searches the file sample-by-sample, and only changes those identified as being suspect. It is possible to operate automatically, or to intervene manually as required.

Noise problems fall into two classes, localised and global. Localised degradation is typically in the form of clicks, ticks, and crackle. The origin is usually scratches and/or dust particles. Neither can be physically removed from the record, although there are methods for cleaning records quite thoroughly, and even playing them back "wet".

Global degradation takes many forms, particularly hiss, rumble, and distortion due to non-Linearity in the play-back equipment. These last two are equipment problems. Only hiss and rumble can be reduced by available software, although there is research into the repair of some types of non-linear distortion.