https://github.com/bspaans/bleep
Synthesizer/sequencer written in Golang
https://github.com/bspaans/bleep
audio golang granular-synthesis music sequencer synthesizer
Last synced: about 1 year ago
JSON representation
Synthesizer/sequencer written in Golang
- Host: GitHub
- URL: https://github.com/bspaans/bleep
- Owner: bspaans
- License: mit
- Created: 2019-03-01T15:15:47.000Z (over 7 years ago)
- Default Branch: master
- Last Pushed: 2024-11-26T08:35:22.000Z (over 1 year ago)
- Last Synced: 2025-03-29T08:06:16.660Z (about 1 year ago)
- Topics: audio, golang, granular-synthesis, music, sequencer, synthesizer
- Language: Go
- Homepage:
- Size: 6.86 MB
- Stars: 108
- Watchers: 8
- Forks: 14
- Open Issues: 3
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# bleep
[](https://goreportcard.com/report/github.com/bspaans/bleep)
[](http://godoc.org/github.com/bspaans/bleep)
Hobby 8bit/16bit synthesizer/sequencer that can also be used as a virtual MIDI device.
I don't really have any goals for this project, but it's #instructive.
## Demo songs / Progress
Old examples first:
1. [basic wave forms and delay](https://github.com/bspaans/bleep/raw/master/demo/demo.mp3)
2. [the shabbiest percussion channel](https://github.com/bspaans/bleep/raw/master/demo/demo2.mp3)
3. [stereo, 16bit, tremelo](https://github.com/bspaans/bleep/raw/master/demo/demo3.mp3)
4. [granular synthesis, sequencer, automations, euclidian rhythms](https://github.com/bspaans/bleep/raw/master/demo/demo4.mp3)
## Features
Things that generate waveforms (`generators/`):
* Sine wave oscillator
* Square wave oscillator
* Sawtooth wave oscillator
* Triangle wave oscillator
* Pulse wave oscillator
* White noise generator
* .wav playback
* Grain generator
* Configurable grain size
* Configurable birth rate
* Configurable density/nr of generators
* Configurable speed (=position in sample)
* Position randomization
* Windowing functions
* TODO: pitch control (= grain playback speed)
Things that wrap things that generate waveforms (`generators/derived/`):
* ADSHR envelopes (attack, decay, sustain, hold, release)
* Transposing generator
* Combining multiple generators into one
* Harmonics generator
* Vocoder
* A filtered generator (see below)
Things that filter (`filters/`):
* Overdrive filter
* Distortion filter
* Delay filter
* Flanger filter
* Tremelo filter
* First order low pass filter
* Convolution filter
* Low Pass Convolution filter
* High Pass Convolution filter
* Band Pass Convolution filter
Things that mix:
* Channels (`channels/`)
* Mixer (`synth/`)
Things that control things that mix:
* Sequencer (`sequencer/`)
* Automations
Things that MIDI (`midi/`):
* MIDI note on, note off, program select, pitch bend
* Basic percussion channel
* Registers as virtual midi device
Things that output:
* `.wav` output (`--record`)
* "Realtime" PortAudio output
* Mono or stereo
## Usage
Bleep uses Go modules and requires Go 1.11+
```
git clone github.com/bspaans/bleep
cd bleep
go run main.go
```
Use `--help` to see the various options and modes.
### Run sequencer patterns
`go run main.go --sequencer examples/sequencer_1.yaml`
### Change instruments banks on sequencer patterns
`go run main.go --instruments examples/bank.yaml --percussion examples/percussion_bank.yaml --sequencer examples/sequencer_1.yaml`
### Record sequencer patterns
`go run main.go --sequencer examples/sequencer_1.yaml --record output.wav`
### Register virtual midi device
`go run main.go --midi`
### Change instruments banks for virtual midi device
`go run main.go --instruments examples/bank.yaml --percussion examples/percussion_bank.yaml --midi`
## Contributing
Contributions are always welcome, but if you want to introduce a breaking
change please raise an issue first to discuss. For small additions and bug
fixes feel free to just create a PR.
## License
This package is licensed under a MIT License:
```
Copyright 2019-2020, Bart Spaans
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
```