The sythesisor uses capacitive sensing to detect when a key is touched.
The 6 potentiometers are for controlling:
DCO (Digitally controlled oscillator): Coarse pitch and Double.
DCF (Digitally controlled filter): Filter peak and ENVmod.
ENV Attack and Decay envelope): Attack and Release affecting amplitude.
The project is a modified version of the project described at https://janostman.wordpress.com/2016/11/28/the-tiny-ts-a-diy-touch-synthesizer/
The midificaitons are to use the Arduino Nano instead of 'raw' chip.
The main components of the synth include:
- 12 key touch keyboard.
- 6 potentiometers to vary the sound. These are connected to analog inputs on the micro-controller to vary the sounds in the software.
- Arduino Nano running special DSP (Digital Signal Processing) code to detect key presses and generate sounds based on the potentiometer positions.
- LM386 audio amplifier module to amplify the sound from the micro-controller and send it to a small speaker.
- The project is run from a 9v battery.