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"""
01-processes-spawning.py - Simple processes spawning, no synchronization.
Need at least 4 cores to be really effective.
Usage:
python3 -i 01-processes-spawning.py
"""
import sys, time, random, multiprocessing
from pyo import *
if sys.platform.startswith("linux"):
audio = "jack"
elif sys.platform.startswith("darwin"):
audio = "portaudio"
else:
print("Multicore examples don't run under Windows... Sorry!")
exit()
class Proc(multiprocessing.Process):
def __init__(self, pitch):
super(Proc, self).__init__()
self.daemon = True
self.pitch = pitch
def run(self):
self.server = Server(audio=audio)
self.server.deactivateMidi()
self.server.boot().start()
# 200 randomized band-limited square wave oscillators.
self.amp = Fader(fadein=5, mul=0.01).play()
lo, hi = midiToHz((self.pitch - 0.1, self.pitch + 0.1))
self.fr = Randi(lo, hi, [random.uniform(0.2, 0.4) for i in range(50)])
self.sh = Randi(0.1, 0.9, [random.uniform(0.2, 0.4) for i in range(50)])
self.osc = LFO(self.fr, sharp=self.sh, type=2, mul=self.amp).out()
time.sleep(30) # Play for 30 seconds.
self.server.stop()
if __name__ == "__main__":
# C major chord (one note per process).
p1, p2, p3, p4 = Proc(48), Proc(52), Proc(55), Proc(60)
p1.start()
p2.start()
p3.start()
p4.start()
time.sleep(35)
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