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"""
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=[0.3, 0.4, 0.5, 0.6, 0.7, 0.4, 0.5, 0.3, 0.6, 0.7, 0.3, 0.5],
mul=0.05,
)
# 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())
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