QR Synth

Build a beat. Scan another phone into the rhythm.

Pattern Sync phones

Checking shared clock…

Tempo 120 bpmVolume 35%

QR detail Smooth Colour Original pattern

Sync & timing

Timing trim 0 ms

Positive delays this phone; negative brings it forward. Use phone speakers for tighter timing. Bluetooth adds variable delay.

Press Play on the first phone, scan its updated QR, then press Play on the second. Keep both pages open. Pattern or tempo changes need another scan.

How it works

Each row is a voice and each column a sixteenth note. Click the QR or the steps below it to edit. Scanning restores all 64 steps, tempo and a shared beat reference. Press Play to join the current beat.

Sound is generated locally after you press Play. The server supplies only a shared clock; no audio or pattern is sent to it. Sync is an estimate, not sample-accurate audio linking.

Read the source

Stopped16 steps

Scan to open this pattern