Pocket Synth

A four-voice synthesizer on a cheap microcontroller. Eight buttons, two knobs, a tiny speaker, and a wavetable small enough to fit in 2 KB of RAM.

Signal path

The core loop

uint8_t sample(Voice *v) {
    v->phase += v->step;             // 16.16 fixed point
    return wavetable[v->phase >> 24]; // top 8 bits pick the sample
}

Roadmap

• Four voices

• Wavetable editor over serial

• Simple sequencer

• 3D-printed case