FM Synthesizer in the Browser via Rust and WebAssembly SIMD

Thanks to the recent stabilization of WebAssembly SIMD, this should run at full speed in Firefox and Chrome!

The audio is generated from scratch as samples (floating-point numbers from -1 to 1) by the WebAssembly code running on your browser's audio rendering thread; all DSP logic there is custom, and it is SIMD-accelerated for high performance even on mobile devices.

Some other features like the filter are implemented using the browser's built-in Web Audio API. Visualizations are made using WebGL with a library called PIXI.JS, and the core of the application is just a plain React app.

I have a blog post where I go into much more detail about its inner workings: https://cprimozic.net/blog/fm-synth-rust-wasm-simd/

Give it a try! Test out a few presets to see the range of sounds it can produce.