Retrieving current value of a PyoObject as a python float

The get() method of the PyoObject allow the user to retrieve the current value of an audio signal as a python float. This can useful if one wants to use an audio signal to drive an algorithm written in pure python.

If the all argument of the get() method is True, it will return a list with the current value of all streams managed by the object. If False (the default), te value of the first audio stream will be returned as a float:

lfos = Sine(freq=[.1,.2,.4,.3], mul=100, add=500)
synth = SineLoop(freq=lfos, feedback=.07, mul=.05).out()

def print_val():
    # Print all four frequencies assigned to SineLoop's freq argument

pat = Pattern(print_val, .25).play()

Complete example

from pyo import *

s = Server(duplex=0).boot()

t = CurveTable([(0, 0), (2048, 0.5), (4096, 0.2), (6144, 0.5), (8192, 0)], tension=0, bias=20).normalize()
t.view(title="LFO Waveform")

# LFO applied on amplitude value of the synths.
a = Osc(table=t, freq=2, mul=0.1)

# Make some modulated noise...
synth1 = BrownNoise(a).mix(2).out()
synth2 = FM(carrier=[100, 50], ratio=[0.495, 1.01], index=10, mul=a).out()

# Oscillator from which to get values to modify the shape of the LFO waveform.
c = Sine(0.1, 0, 10, 10)

def change():
    # Get the current value of the oscillator.
    val = c.get()
    # Print the value to the console.
    print("Current oscillator value:", val)
    # Change the bias of the curve and normalize the table.

# Call change() function 10 times per second.
p = Pattern(change, 0.1).play()