The Modularium is live
I built a modular synthesizer that runs entirely in your browser. No plugins, no downloads, no 400MB sample library that takes twenty minutes to unzip. Just open a tab and start patching cables.
It's called The Modularium, and today it's properly live. With payments and everything. I know. I'm as surprised as you are.
If you've ever been curious about modular synthesis but found hardware Eurorack systems intimidating (or, let's be honest, absurdly expensive), this is your way in. Everything works the same as the real thing. Oscillators, filters, envelopes, LFOs, patch cables. Wire an LFO into a filter cutoff and you get a wah effect. Patch a second oscillator into the FM input and things get weird fast. That's the fun of it.
The free version gives you a fully working synth. One oscillator, one filter, one envelope, one LFO, a sequencer, a keyboard, delay, and five presets to get you started. There's also the first five lessons of a 22-lesson tutorial course (plus 4 challenges) that takes you from "what is an oscillator?" to building your own patches from scratch.
Pro unlocks the full rack: four oscillators, dual filters, ring modulator, reverb, compressor, quantizer, MIDI controller support, the CV/Gate scope for debugging your signal chain, a loop recorder, and all the presets and lessons. Basically, everything you'd find in a serious Eurorack setup, minus the tangled cables on your desk. (The on-screen cables get plenty tangled on their own.)
Pricing is simple. £2.99 a month if you want to dip in, or £29.99 once for lifetime access (launch offer, price will rise). No tricks, no upsells, cancel whenever you like.
The audio engine runs at sample rate using the Web Audio API. CV signals sum naturally when you patch multiple sources to the same input. It behaves like hardware because it's built like hardware.
If you're a synth person, a music teacher, a curious tinkerer, or someone who just wants to make strange noises in a browser tab while pretending to be in a meeting, go have a play. The free version is right there. No signup needed.