"""
07-multichannel-expansion-2.py - Extended multichannel expansion.

When using multichannel expansion with lists of different lengths,
the longer list is used to set the number of streams and smaller
lists will be wrap-around to fill the holes.

This feature is very useful to create complex sonorities.

"""
from pyo import *

s = Server().boot()

# 12 streams with different combinations of `freq` and `ratio`.
a = SumOsc(freq=[100, 150.2, 200.5, 250.7],
           ratio=[0.501, 0.753, 1.255],
           index=[.3, .4, .5, .6, .7, .4, .5, .3, .6, .7, .3, .5],
           mul=.05)

# Adds a stereo reverberation to the signal
rev = Freeverb(a.mix(2), size=0.80, damp=0.70, bal=0.30).out()

s.gui(locals())