v.saturation single stream: set the saturation for a yuv stream dual stream: use the brightness of stream 2 to set the saturation for corresponding pixels in stream 1 single stream: set the saturation for a yuv stream dual stream: use the brightness of stream 2 to set the saturation for corresponding pixels in stream 1 In single stream mode, v.saturation adjusts the saturation of each pixel by a value. Streams with int16, int32 and float components are processed in their existing component sizes. In dual stream mode, v.saturation adjusts the saturation of each pixel in stream 1 by the brightness of the corresponding pixel in stream 2. The streams are both forced to int8 before processing. You can set additional gain, and define how the second streams values are interpreted using gain and modulation_center messages.

from the library : softVNS Format : External Environment : jitter / max commercial Max 4.x http://homepage.mac.com/davidrokeby/softVNS.html