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Offline batch generation of synthesis sounds
============================================================================================================================================
**06-batch-synthesis.py**
This program demonstrates how to use pyo to do offline synthesis batch
generation.
.. code-block:: python
import os
from pyo import *
# Initialize the Server in offline mode.
s = Server(duplex=0, audio="offline")
# Path to the output sound folder (user's home directory/pyo_batch_synth/).
output_folder = os.path.join(os.path.expanduser("~"), "pyo_batch_synth")
# Create the folder if it does not exist.
if not os.path.isdir(output_folder):
os.mkdir(output_folder)
# Output file duration.
dur = 2
# How many file to generate.
NUM = 12
# Enter the batch synthesis loop.
for i in range(NUM):
# Boot the Server.
s.boot()
# Define the pitch of the note.
note = 60 + i
noteFreq = midiToHz(note)
# Set recording parameters.
s.recordOptions(
dur=dur + 0.1, filename=os.path.join(output_folder, "file_%02d.wav" % note), fileformat=0, sampletype=0,
)
# Synthesis, an exponential envelope modulating a slightly out-of-tune stereo oscillator.
env = Adsr(attack=0.005, decay=0.15, sustain=0.7, release=1.7, dur=dur).play()
qenv = Pow(env, 4, mul=0.8)
osc1 = SineLoop(freq=noteFreq, feedback=0.075, mul=qenv).out()
osc2 = SineLoop(freq=noteFreq * 1.01, feedback=0.075, mul=qenv).out(1)
# Start thw rendering.
s.start()
# Cleanup for the next pass.
s.shutdown()
print("Batch processing done!")
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