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10-arithmetic-ops.py - Using arithmetic with event generators.
============================================================================================================================================
Arithmetic operators can be used with EventGenerator objects to control
their behaviour (and change the pattern of the sequence of values).
Available operators are:
`+` : addition
`-` : substraction
`*` : multiplication
`/` : division
`**`: exponent
`%` : modulo (remaining of the division)
`//`: quantizer (returns te nearest multiple of its argument)
Arithmetic can be done with event generators as both operand and operator.
.. code-block:: python
from pyo import *
s = Server().boot()
# Half-semitone scale (the octave is divided in 24 equally-spaced steps).
# The integer (a semitone in midi note) is divided by 2, which mean that
# there are two values inside a single integer.
e = Events(
midinote=EventDrunk(list(range(48)), maxStep=-2) / 2.0 + 72,
beat=1 / 4.0,
db=-12,
attack=0.001,
decay=0.05,
sustain=0.5,
release=0.005,
).play()
# Quantize to multiples of a minor third.
e2 = Events(
midinote=EventCall(random.uniform, 60, 72) // 3,
beat=1 / 4.0,
db=-12,
durmul=1,
attack=0.001,
decay=0.05,
sustain=0.5,
release=0.005,
).play()
# EventGenerator as arithmetic operator. Kind of ostinato.
e3 = Events(
midinote=EventSeq([48, 50, 52]) - EventSeq([0, 2, 4, 6]),
beat=1 / 4.0,
db=-12,
durmul=1,
attack=0.001,
decay=0.05,
sustain=0.5,
release=0.005,
).play()
s.gui(locals())
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