Arduino Synth Build for Generative Techno, using Mozzi library in Volca-form-factor.

Update: This was my personal project before I rebranded Meebleeps as Wirehead Instruments in 2023 and released DIY KIT or factory-built Freaqs with next-gen firmware, and more! check out www.wireheadinstruments.com

My first Arduino project started as an experiment in what noises I could make, and turned into a cool little generative synth that I can let run all day, built to fit in with my Volca collection.

Inspired by Hagiwo's modular builds:    / @hagiwo  
Mozzi audio library: https://sensorium.github.io/Mozzi/
Inkscape for vector graphics: https://inkscape.org/
Fritzing for circuit design: https://fritzing.org/
Great Scott for awesome electronics tips!    / @greatscottlab  

Synth Voice Features
2 saw oscillators
Multiple tuning modes for 2nd oscillator - off, detune, fifths & octaves up/down
Digital low pass filter with variable cutoff and resonance - Variable level ducking/sidechain effect

Sequencer Features
Generative sequencer mutates/evolves at user-defined rate
Sync input & output (Korg Volca compatible)
Variable sequence mutation probability & note-density
Variable sequencer length (1-16 steps)
Selectable tonic note
Selectable scale quantisation (Major, Minor, Pentatonic, Phrygian (GOA!), Octaves, Fifths)
16-step parameter-lock recording of synth parameters (the Elektron way!) - Retrig (clone) button for fills
Tap-tempo control

Hardware
Arduino Nano (Elegoo)
Simple Mozzi output circuit
CV inputs (volca modular levels) for synth and sequencer parameters
Designed to fit into Volca form factor
Laser-cut metalisized acrylic faceplate
Laser-cut wooden box
9V DC Power input
Access to nano's USB port for firmware upgrades

Problems (mostly electronic hardware due to this being my first project!)
no voltage protection on inputs
no buffering of inputs or outputs
no volume control
probably more unknown unknowns 😂

0:00 Synth Features
0:43 Filter Envelope
1:01 Parameter Locking
1:29 Ducking/sidechain effect
1:51 Volca-sync compatible
2:07 Design & build process
2:52 Laser cutting
3:10 Code flyover