https://github.com/thomasfredericks/op-synth
Open source modular micro analog synthesizer designed to facilitate the understanding of electronics, audio synthesis, audio theory, and filtering.
https://github.com/thomasfredericks/op-synth
analog art electronics hacking op-synth oscillator synthesizer
Last synced: 4 months ago
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Open source modular micro analog synthesizer designed to facilitate the understanding of electronics, audio synthesis, audio theory, and filtering.
- Host: GitHub
- URL: https://github.com/thomasfredericks/op-synth
- Owner: thomasfredericks
- Created: 2016-03-23T17:23:20.000Z (over 10 years ago)
- Default Branch: master
- Last Pushed: 2025-04-06T13:02:35.000Z (about 1 year ago)
- Last Synced: 2025-11-20T20:02:47.479Z (7 months ago)
- Topics: analog, art, electronics, hacking, op-synth, oscillator, synthesizer
- Homepage: http://tofstuff.com
- Size: 4.62 MB
- Stars: 24
- Watchers: 4
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# Op-Synth
Op-Synth is an open-source modular micro analog synthesizer designed to facilitate the understanding of electronics, audio synthesis, sound theory, and filtering.
Op-Synth is a 100% analog kit that requires assembly. It is easy to build and serves as an excellent introduction to electronics. It teaches the basic principles of sound synthesis through a modular patch bay, just like a traditional modular analog synthesizer. It also features an LED that helps visualize the evolution of the sound signal, serving as a basic introduction to synesthesia.
In addition to generating its own audio signal, the Op-Synth includes an audio input, allowing musicians to manipulate sounds from their cellphone, music player, or electric guitar. Multiple Op-Synths can be chained together to create more complex sonic textures. Despite its small size (3" x 3"), this synthesizer is powerful and affordable.
All circuitry is built as independent modules that are easy to isolate, understand, and hack.
## Videos
* [Op-Synth Introduction](https://vimeo.com/214735193)
* [Op-Synth Basics Tutorial](https://vimeo.com/225257448)
* [Op-Synth : Adding the Optional External Photocell and Diode](https://vimeo.com/225840352)
* [Op-Synth : External Input](https://vimeo.com/209483661)
* [Op-Synth Hacking : External LED](https://vimeo.com/212077716)
## Credits
* Electronics : Thomas O Fredericks
* Graphical design and illustrations : Denis Raby
## Booklet
[20 page booklet in French](Op-Synth(livret).pdf)
## Technical Specifications
* 1x resistance controlled (either with a potentiometer or light sensitive sensor) triangle oscillator
* 1x pitch modulation of the previous oscillator
* 1x resistance controlled (either with a potentiometer or light sensitive sensor) low frequency triangle oscillator
* 1x light and resistance controlled filter with feedback control
* 1x PWM (pulse width modulation) module that can also distort and output square waves
* 1x switch that turns on the LED
* 1x LED (the led can be controlled with the switch or another signal)
* 1x stereo output (two independent signals)
* 1x stereo input (two independent signals)
* 5V to 9V battery powered
### Inputs and Outputs of the Patchbay
* in left
* in right
* vco : resistance controlled oscillator
* ~vco : pitch modulation
* lfo : low frequency resistance controlled oscillator
* ~led : led modulation
* pwm (input, modulation, output) : pulse width modulation
* filter in
* filter out
* out left
* out right