Apply audio soft clipping.

Soft clipping is a type of distortion effect where the amplitude of a signal is saturated along a smooth curve, rather than the abrupt shape of hard-clipping.

This filter accepts the following options:

type

Set type of soft-clipping.

It accepts the following values:

• tanh
• atan
• cubic
• exp
• alg
• quintic
• sin

param

Set additional parameter which controls sigmoid function.