Decrackling - Screen Shots

A "fingerprint" is then taken of this noise and crackle.

Then, the section to be decrackled is selected and the decrackle feature invoked:

Sensitivity determines how much background noise and crackle is isolated; over-ambitious settings here will cause too much of the music itself to be pulled out. Threshold determines how aggresively the crackle is removed from the isolated noise and crackle; over-ambitious settings here will lead to a roughness in the resulting sound.