Paper Synthesizer is a modular analgue synthesizer. It allows to sculpt electric circuits into sonic waveforms.
Paper Synthesizer are compatible to eurorack.

Paper Synthesizer started as a collaboration by Antti Pussinen und Wolfgang Spahn in 2014. It's design is based on Wolfgnag Spahn's Paper PCBs
Since2017 it's developed exclusivly by Wolfgang Spahn
An similar and enhanced version one finds here:
Paper Bits

• PS100 - Hard-Sync Oscillator *1
• PS110 - Voltage Controlled Oscillator *2
• PS110 - Wave Converter *2
• PS201 - MIDI to CV *2
• PS202 - MIDI-Duino *2
• PS301 - Diode Wavefolder *1
• PS411 - EnvAmp (Attack/Release Envelope Generator & Opto-VCA) *1
• PS808 - Kick Drum Board *2
• PS000 - Power-Supply *2
• Calibration Keyboard for PS110 *2
• DC-DC 5Vto2x12V Converter Board *2
• USB to FFC Power Connector *2

*1 These Boards were designed by Antti Pussinen 2014-17.
*2 These Boards were designed by Wolfgang Spahn 2014-21.

They are licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.