This is a simple modular-like command line synthesizer for Linux written in golang.

To run the synthesizer you might also need to install portaudio.

1. Install and setup Go
2. Clone the repository

git clone [email protected]:iljarotar/synth.git

3. Install

cd synth
make build
cp bin/synth <SOMEWHERE_IN_YOUR_PATH>

The synth is programmed by providing a patch file. A patch is a yaml file, that tells the synth, which oscillators, noise generators, etc. should be created and how they should be connected. When you tell the synth to load a file, if will start playing immediately. During playback a hot reload is possible, so if you change and save the patch file, it will be applied instantly.

To listen to an example run

synth examples/a-major.yaml

Run synth -h to see all configuration options.

A sampler periodically samples the output values of the given inputs and outputs their sum.

If both low-cutoff and high-cutoff are omitted, the filter is disabled. If low-cutoff is omitted, the filter is a lowpass filter transitioning at the high-cutoff frequency. If high-cutoff is omitted, the filter is a highpass filter transitioning at the low-cutoff frequency. If both cutoff frequencies are defined, it becomes a bandpass filter.

Playing this file outputs a 440 Hz sine wave.

vol: 1
out: [osc]
oscillators:
  - name: osc
    type: Sine
    freq: { val: 440 }
    amp: { val: 1 }