Sine Wave Speech, a real-time audio effect in Rust->WASM
Source code: https://github.com/vvolhejn/sine_wave_speech An interactive website for exploring how human speech can be reduced to just a few sine waves and still be intelligible - or at least recognized to be a human voice. On top of that, I've added various ways to make the sound more musical. The sound effect is based on research from the 80s, which has largely been forgotten by then. To have the effect run in real-time in the browser, I opted to use Rust compiled into WebAssembly. Still, I had to rewrite some linear algebra routines. More about that experience in the…
In plain words
Sine Wave Speech is an interactive browser tool that demonstrates how human speech can be reconstructed using only a few sine waves while remaining intelligible. Built with Rust compiled to WebAssembly for real-time performance, it lets users explore the principle by inputting their own audio and applying various musical effects. Based on 1980s research, the tool shows how speech perception works at a fundamental level, making it useful for anyone interested in audio processing, digital signal processing, or the science of how humans recognize voices.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Source code: https://github.com/vvolhejn/sine_wave_speech An interactive website for exploring how human speech can be reduced to just a few sine waves and still be intelligible - or at least recognized to be a human voice. On top of that, I've added various ways to make the sound more musical. The sound effect is based on research from the 80s, which has largely been forgotten by then. To have the effect run in real-time in the browser, I opted to use Rust compiled into WebAssembly. Still, I had to rewrite some linear algebra routines. More about that experience in the blog post: https://vvolhejn.com/2024/11/16/sinewavespeech-com-live.html
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