A simple music synthesizer for Python 3

midi, music, python, synthesis
pip install PySynth


Current project status

PySynth is no longer being actively developed by me and has therefore been removed from PyPI.

If you would like to take over as maintainer of the project, please fork it now!

This repo may be deleted in the future.


PySynth is a simple music synthesizer for Python 2 or 3. The goal is not to produce many different sounds, but to have scripts that can turn ABC notation or MIDI files into a WAV file without too much tinkering.

The current release of the synthesizer can only play one note at a time. (Although successive notes can overlap in PySynth B and S, but not A.) However, two output files can be mixed together to get stereo sound.

Synthesizer scripts

Synth Synthesis method Approximate timbre Note decay Needs NumPy?
A additive (3 sine waves) flute, organ, piano variable (depends on note length) no
B additive (5 sine waves) acoustic piano medium yes
C subtractive (sawtooth wave) bowed string, analog synth pad none no
D subtractive (square wave) woodwind, analog synth lead none no
E FM/phase modulation (6 sine waves) DX7 Rhodes piano medium yes
P subtractive (white noise) untuned percussion hit very fast no
S Karplus-Strong (physical modeling) plucked string, guitar, koto fast yes
beeper additive Nokia phone ringtone none no
samp sampler Salamander Grand Piano medium yes



Clone the repository:

git clone


git clone

Enter the directory (cd PySynth) and run

python3 install

Sample usage

Basic usage:

import pysynth as ps
test = (('c', 4), ('e', 4), ('g', 4),
		('c5', -2), ('e6', 8), ('d#6', 2))
ps.make_wav(test, fn = "test.wav")

More advanced usage:

import pysynth_b as psb # a, b, e, and s variants available

''' (note, duration)
Note name (a to g), then optionally a '#' for sharp or
'b' for flat, then optionally the octave (defaults to 4).
An asterisk at the end means to play the note a little 
louder.  Duration: 4 is a quarter note, -4 is a dotted 
quarter note, etc.'''
song = (
  ('c', 4), ('c*', 4), ('eb', 4), 
  ('g#', 4),  ('g*', 2), ('g5', 4),
  ('g5*', 4), ('r', 4), ('e5', 16),
  ('f5', 16),  ('e5', 16),  ('d5', 16),
  ('e5*', 4) 

# Beats per minute (bpm) is really quarters per minute here
psb.make_wav(song, fn = "danube.wav", leg_stac = .7, bpm = 180)

Read ABC file and output WAV:



More documentation and examples at the PySynth homepage.