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webdx7 (AudioWorklet/WASM edition)

virtual Yamaha DX7 synth in a browser.

demo

other WAM demos at webaudiomodules.org/wamsynths

Please note that low latency AudioWorklets require Chrome Canary 64 (or later) and setting a flag as explained here. Other stable browsers are enabled with this polyfill.

info

This repo contains a work-in-progress implementation of webdx7 in WebAssembly. The binary runs in AudioWorklet. webdx7 is built on top of Web Audio Modules (WAMs) API, which is currently extended to support AudioWorklets and WebAssembly.

The code here includes pure hacks to work around limitations in current AudioWorklet browser implementation, and should definitely not be considered best practice :) WAMs API will be updated as AudioWorklets mature.

prerequisites

building, distribution and demo usage

#1 wasm compilation and encoding

cd build
export PATH=$PATH:/to/emsdk/where/emmake/resides
emmake make

step #1 creates three files:

  • the loader: dx7.js.
  • the raw WASM binary: dx7.wasm
  • a JavaScript embedding of the WASM binary: dx7.wasm.js

#2 copy built files to dist/dx7/wasm

Next copy the built files to dist/dx7/wasm by running:

make dist

#3 try it out

Now that you've built webdx7 and put the files in place, copy some DX7 sysex files into dist/dx7/presets. See readme there for instructions.

Finally open dist/dx7.html in a WASM-enabled browser and enjoy cool authentic FM sounds straight in browser. Works with MIDI and embedded virtual keyboard.

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