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.

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.

• WASM toolchain
• node.js

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

step #1 creates two files, dx7.wasm and dx7.js. WASM binary cannot currently be loaded into AudioWorkletProcessor (AWP) directly, so let's encode it into a JS Uint8Array in step #2.

node encode-wasm.js dx7.wasm

step #2 produces dx7.wasm.js file, which can be loaded into AWP.

We have now dx7.wasm.js (from step #2) and its loader dx7.js (from step #1). Copy these files to dist/dx7/wasm folder, and 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.