Play a synthesizer, right here in your browser.
Two oscillators, a resonant filter, a full ADSR envelope, an LFO, drive and delay, a real polyphonic synthesizer built on the Web Audio API. No signup, no downloads, nothing to install. Grab a preset, play the keys, and start turning knobs. Headphones recommended.
How to play it
Click the keyboard at the bottom, or use your computer keys, A S D F G H J K L are the white notes and W E T Y U O the black ones. Start with the presets in the top-right corner of the panel: Dream Pad for slow ambient chords, Wobble Bass for LFO wubs, Acid Lead for squelchy 303-style lines, Pluck for tight melodic stabs. Then break them: every knob responds live while you hold notes.
What all these knobs actually do
This synth is the classic subtractive signal chain: two oscillators make a bright raw tone, the filter carves away harmonics (cutoff = brightness, resonance = the whistle at the edge), the envelope shapes each note in time, and the LFO wiggles whatever you point it at. If any of that sounds like magic words, that's exactly what the course is for, each concept is a short interactive lesson with the same knobs you see here.
Eight free interactive lessons, from "what is sound" to patching a synth like this yourself.