Grovity

Sequencer for rhythmic compositions with a focus on micro-rhythms.

Main features of Grovity:

• Time shift of each pulse allowing a precise tuning of swings, grooves and other temporal dynamics
• GPIO output: Grovity can send signals to motors (solenoids) interfaced on a Raspberry pi
• MIDI output
• Ability to compose polyrhythms
• Generated euclidean rhythmic patterns
• Bright / Dark mode

Made with Vue.js, Tone.js and WebSocket.

Short video demos: #grovity on my peertube channel.

Build Setup

npm install

serve with hot reload at localhost:8080

npm run dev

build for production with minification

npm run build

Testing

Rename config/default_index.js to config/index.js.

You can test on a computer withou GPIO, like a normal computer that is not a raspberry pi, by changing the value of hasGPIO in config/index.js.

Inspirations

Thanks to Benjamin Steephenson and his great Step-Sequencer https://github.com/bsteephenson/Step-Sequencer

Todo

• Negative offset 🤔
• Socket.io stuck to 2.2.0 because of this issue so I need to keep an eye on it to make an upgrade possible

Hardware

I use

• a Raspberry Pi 3 model B
• 3+ solenoids: DC6V DC12V DC24V HCNE1-0530 Open frame type electromagnet push-pull type 5N 10mm tensile
• 1 solenoid 25X50TL Push-pull type crash type miniature electromagnet DC 12V 24V Tubular Electric Solenoid Electromagnet Stroke 10-15mm 300g
• For each solenoid used, 1 IRF520 MOSFET Driver Module

Other prototypes

See independent README files in prototypes/.