This is an example of how to go from livecoding audio in C++ to compiling with emscripten into something that can run on a modern web browser. This repo is mostly here to remind me how I got it all set up and the Makefiles etc, hopefully it can be helpful to others!
Here's a demo of what it generates for web: https://elf-audio.github.io/cpp2emscripten-demo/
The example is a sort of gong simulation, just for testing purposes, the purpose isn't to explain that code, it's the process of
Prerequisites: Mac only, xcode tools and emscripten installed
To compile and run the livecoding version, clone this repo, cd to it and type make
That should build the livecoding c++ app and the web version
If you then type ./audio it should run the C++ livecoding version - you can go into src/MyLiveAudio.h and tweak the code to change the sound as you wish.
This livecoding system all works because of this: https://github.com/elf-audio/cppsketch and is based on the audio example in there.
If you cd to the www directory and type python -m SimpleHTTPServer 8080, which runs a local webserver from this directory, then go to http://localhost:8080/ in your browser (then press start), that is the C++ code, transpiled into Javascript, that's making the noise you hear!
How this works: the makefile calls emcc to compile a file called src/em.cpp which basically just calls the dsp code in the main source, asking it for samples. Then there's a little bit of javascript that interacts with emscripten in wwww/index.html to grab that audio and send it out of the speaker. The html file is heavily commented with my findings.