Music with Python

Music with Python¶

Install Pyo¶

pip install pyo
pip install wxpython

Find Pyo audio output¶

Find correct output with : https://stackoverflow.com/a/55521596/6419007

In [ ]:

from pyo import *

print("Audio host APIS:")
pa_list_host_apis()
pa_list_devices()
print("Default input device: %i" % pa_get_default_input())
print("Default output device: %i" % pa_get_default_output())

Pyo - Sine curve¶

In [ ]:

from pyo import *

s = Server(duplex=0)
s.setOutputDevice(3)
s.boot()
s.start()
a = Sine(mul=0.01).out()
s.gui(locals())

Pyo - More complex melody¶

In [ ]:

# https://github.com/tiagovaz/pyo-collection/blob/master/presentation/pyo-presentation.md
from pyo import Server, LinTable, Beat, TrigEnv
from pyo import TrigXnoiseMidi, Snap, Sine, SineLoop, Delay

s = Server(duplex=0)
# Find correct output with : https://stackoverflow.com/a/55521596/6419007
s.setOutputDevice(3)
s.boot()
s.start()

# Builds an amplitude envelope in a linear table
env = LinTable([(0, 0), (190, .8), (1000, .5),
               (4300, .1), (8191, 0)], size=8192)
env.graph()

# Metronome provided by Beat
met = Beat(time=.125, taps=16, w1=90, w2=50, w3=30).play()

# Reads the amp envelope for each trigger from Beat
amp = TrigEnv(met, table=env, dur=met['dur'], mul=met['amp'])

# Generates a midi note for each trigger from Beat in a pseudo-random distribution
fr = TrigXnoiseMidi(met, dist=12, x1=1, x2=.3, scale=0, mrange=(48, 85))

# Receives the midi note from XnoiseMidi and scale it into C harmonic minor (try others!)
frsnap = Snap(fr, choice=[0, 2, 3, 5, 7, 8, 11], scale=1)

# This instrument receives a frequency from Snap and molde it inside an envelop from TrigEnv
lfo = Sine(freq=.05, mul=.05, add=.08)
gen = SineLoop(freq=frsnap, feedback=lfo, mul=amp * .5).out(0)

# Output the same signal with some delay in the right speaker
rev = Delay(gen, delay=[.25, .5], feedback=.3, mul=.8).out(1)

s.gui(locals())