Back to feed
Dev.to
Dev.to
7/24/2026
How I Built a BRSTM Converter with WebAssembly — Technical Deep Dive

How I Built a BRSTM Converter with WebAssembly — Technical Deep Dive

Short summary

A technical deep dive into building a browser-based BRSTM converter using three WebAssembly modules compiled from C via Emscripten. The architecture splits decoding (vgmstream.wasm), encoding (sound.wasm), and export (lame/vorbis) across Web Workers to keep the UI at 60 FPS. The author debugged a critical PCM interleaving bug that caused garbled multi-channel audio output.

  • •Three WASM modules handle decoding (vgmstream), BRSTM encoding (DspTool), and MP3/OGG export
  • •Web Workers keep encoding off the main thread for smooth UI performance
  • •Fixed a PCM deinterleaving bug where channel indexing caused garbled audio

Generated with AI, which can make mistakes.

#open-source#ai-tools
Read full article at Dev.to

Is this a good recommendation for you?

Comments

Failed to load comments. Please try again.

Explore more

Browser-Side File Conversion with WebAssembly
Dev.to
I Built a Free Browser-Based File Converter Using WebAssembly — No Uploads, Ever
Dev.to
I built a Morse code translator that renders WAV audio entirely in the browser
Dev.to
I Built 58 Free Browser Tools With Zero Backend — Here's the Full Stack
Dev.to