When you modify the library code in lib folder, you need to bundle it:
npm run bundle
An example is in examples folder. To ear it, you can use http-serve node package (npm install -g http-server), and run
http-server from the root directory of m4dp-audio-modules, and open http://0.0.0.0:8080/examples/index.html .
To generate doc from source code:
npm run doc