sheldon nand

sheldon nand

Solo dev building a pocket instrument
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About

Iā€™m a solo developer building cy83rd3ck ā€” a sequencer, synth, arpeggiator, and multitrack recorder that runs in Safari on iPhone, no install needed. The web app is the prototype for a physical instrument: iPhone-sized, Raspberry Pi CM4, 2-octave keys, built for musicians who live on their phone.

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Maker History

  • cy83rd3ck
    cy83rd3ckOpen source music instrument that runs in your browser
    Jun 2026
    • šŸŽ‰
    Joined Product HuntJune 8th, 2026

Forums

cy83rd3ckp/cy83rd3cksheldon nandā€¢

5h ago

What would you want in a pocket music instrument?

cy83rd3ck started as a web app sequencer, synth, arpeggiator, multitrack recorder, all in a browser, free, no install. Now I m designing the hardware: iPhone-sized, Raspberry Pi CM4, 2-octave touch keys, full width of the device.

Try the app now while you wait for launch: https://happyfaceemoji.github.io...

Curious what the community thinks what s missing from current pocket instruments like the OP-1 or OP-Z that you wish existed?

sheldon nandā€¢

4h ago

cy83rd3ck - Open source music instrument that runs in your browser

Free open source music instrument that runs in Safari on iPhone ā€” no install needed. 14 drum machines, 10 synth engines, step sequencer, arpeggiator, multitrack recorder, sampler, piano keyboard, MIDI output. All built from scratch with Web Audio API ā€” no audio libraries. Working on a physical hardware version: CM4, touchscreen, piano keys, iPhone-sized.
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