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"""
02-scrubbing.py - Navigate through a sound table.
The SndTable object allows to transfer the data from a soundfile
into a function table for a fast access to every sample.
This example illustrates how to do scrubbing with the mouse in
a sound window. The mouse position is then used to control the
position and the balance of a simple stereo granulator.
Give the focus to the Scrubbing window then click and move the mouse...
"""
from pyo import *
s = Server().boot()
# The callback given to the SndTable.view() method.
def mouse(mpos):
print("X = %.2f, Y = %.2f" % tuple(mpos))
# X value controls the granulator pointer position.
position.value = mpos[0]
# Y value controls the balance between left and right channels.
l, r = 1.0 - mpos[1], mpos[1]
leftRightAmp.value = [l, r]
# Load and normalize the sound in the table.
snd = SndTable("../snds/ounkmaster.aif").normalize()
# Open the waveform view with a mouse position callback.
snd.view(title="Scrubbing window", mouse_callback=mouse)
# Left and right channel gain values.
leftRightAmp = SigTo([1, 1], time=0.1, init=[1, 1], mul=0.1)
# Position, in samples, in the SndTable.
position = SigTo(0.5, time=0.1, init=0.5, mul=snd.getSize(), add=Noise(5))
# Simple sound granulator.
gran = Granulator(
table=snd, # the sound table.
env=HannTable(), # the grain envelope.
pitch=[0.999, 1.0011], # global pitch (change every grain).
pos=position, # position in the table where to start a new grain.
dur=Noise(0.002, 0.1), # duration of the grain (can be used to transpose per grain).
grains=64, # the number of grains.
basedur=0.1, # duration for which the grain is not transposed.
mul=leftRightAmp, # stereo gain.
).out()
s.gui(locals())
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