Heisenberg
Synthesizers
Four-operator phase-modulation synthesizer with flexible modulation matrix and dynamic control.

What is Heisenberg?
Four-operator phase-modulation synthesizer with flexible modulation matrix and dynamic control. Perfect for digital pianos, bells, basses, and experimental textures.
Heisenberg is a synthesizer in Audiotool — the collaborative online DAW that runs entirely in your browser, with modular routing and a full device rack built in.
What you can do with Heisenberg
- Design your own sounds — basses, leads, pads, and textures.
- Play it live with a MIDI keyboard or program notes in the piano roll.
- Record a performance, then quantize, transpose, and edit it.
- Route it through Audiotool's effects and mixer in a modular signal chain.
- Start from a community preset or save your own.
Key capabilities
- Four-operator phase-modulation synthesizer with flexible modulation matrix and dynamic control.
- Perfect for digital pianos, bells, basses, and experimental textures.
- Runs entirely in your browser — no download or install.
- Part of Audiotool's full studio — free, with no track or feature limits.
Make music with Heisenberg, right in your browser
Heisenberg is built into the Audiotool studio. Open it and start your next track in seconds.
Learn how to use Heisenberg
Step-by-step guides, parameter references, and tutorials live in the Audiotool manual.
Frequently asked questions
Is Heisenberg free to use?
Yes. Heisenberg is part of Audiotool's free, browser-based studio. There's no download or install, and there are no track or feature limits on the core DAW.
Do I need to install anything to use Heisenberg?
No. Audiotool runs entirely in your web browser, so you can open Heisenberg and start making music straight away — there's nothing to download or install.
How do I open Heisenberg in Audiotool?
Open the Audiotool studio in your browser, then add Heisenberg to your project from the device rack. You can also start from one of the community presets.
Can I play Heisenberg with a MIDI keyboard?
Yes. You can play Audiotool's instruments live with a MIDI keyboard, record your notes and automation, and edit them in the piano roll.
Where can I learn how to use Heisenberg?
Step-by-step guides, tutorials, and parameter references live in the Audiotool manual at www.audiotool.com/help.





