Interactive browser instrument

Learn Modular Synth

Learn how modular synthesis works by building real patches. Drag modules into the rack, connect color-coded cables, hear every change instantly, and let the built-in tutorial guide you from your first oscillator to a complete playable synth.

Start the synth → Free · Runs in your browser · Best on desktop
VCO
FREQ
OUT
VCF
IN
CUTOFF
OUT
OUTPUT
IN
LEVEL ●
KEYBOARD
PITCH
GATE
Yellow

Audio

The sound itself, traveling from oscillators through filters and into the output.

Green

Control voltage

Signals that move parameters for you: pitch, cutoff, volume, and modulation.

Blue

Gate

Simple note-on and note-off events that trigger envelopes when you play.

Six lessons

Build knowledge one cable at a time.

Your first sound

Connect a VCO directly to the Output and hear how waveform and frequency shape a raw tone.

Play notes

Add the keyboard and use pitch CV to turn a static oscillator into an instrument.

Shape with a filter

Patch in a VCF and explore cutoff, resonance, and classic subtractive synthesis.

Create an envelope

Use a VCA and ADSR to give every note an attack, decay, sustain, and release.

Add movement

Connect an LFO to the filter and hear slow modulation become a rhythmic wobble.

Experiment freely

Finish with delay and noise, then break away from the tutorial and build your own patches.

Made for learning

The rack teaches while you patch.

Automatic feedback

Every step checks itself

The tutorial notices when the correct module, cable, or control change is in place and advances automatically.

Real Web Audio

Hear every connection

This is a working synth, not a diagram. Oscillators, filters, envelopes, modulation, noise, and delay respond in real time.

Free play

Build without instructions

Switch out of tutorial mode, arrange the rack however you like, cut cables, repatch, and discover your own signal paths.

Patch ideas

Try a wobble, pluck, siren, or drone

Ready-made recipes highlight the modules and jacks you need for vibrato, ocean waves, auto-wah, dub delay, metallic FM, and more.

Ready?

Make your first patch.

Start with an empty rack. The tutorial gives you one clear task at a time, remembers your progress in this browser, and gets you making sound within minutes.

Start Learn Modular Synth →