#arm #cortex-m #synthesizer #audio #synthesiser

nightly no-std monotron-synth

A simple 1980's home computer style synthesiser that sounds pretty bad

2 unstable releases

Uses old Rust 2015

0.2.0 Oct 25, 2018
0.1.0 Sep 23, 2018

#4 in #pull-out

31 downloads per month


430 lines

Monotron Synth

This is a very rudimentary synthesiser for use on Monotron.

It is #![no_std] crate with no dynamic memory allocation. It's a small structure containing four oscillators where each oscillator has a volume, a frequency and a waveform. You can either modify the oscillators, or pull out the next sample. Each sample is calculated as the sum of the output of each oscillator, and the samples are signed 8-bit values.

It produces a pretty gritty noise, which if you're trying to simulate a late 1970s / early 1980s home computer is probably about right.


  • Sine wave
  • Triangle wave
  • Square wave
  • Noise (ish)


  • ADSR envelopes


MIT or Apache 2 at your choice.

No runtime deps