Currently (beast-0.7.1), there are different places where post processoring networks can be used:

• A PostProcessor can be defined for each track of a song. To do this, select the "Post" column of the song, and select a suitable effect to apply. What BEAST will do, then, is computing the output of all voices of this track, mixing it down, and run it through the PostProcessor, then. This means that for instance if the midi events for an accord will be played, the instrument network modules will be computed once per voice, whereas the PostProcessor will only be computed once.

• You can also define a PostProcessor for the whole song, by selecting the desired Effect on the Properties tab of the song. Note that the PostProcessor then will be run after all other effects have been run.

• Similar to tracks, a MidiSynthesizer? also allows defining a PostProcessor.

To create a PostProcessor with a desired function, the easiest way is to load an example effect, and modify its network.

The long term development plan is to implement effects in the mixer, and these will probably replace this functionality.