tuner-js 🎸🎶
- https://www.youtube.com/watch?v=HnQQL8Q9upA
- https://developer.mozilla.org/en-US/docs/Web/API/Web_Audio_API
- https://willianjusten.com.br/braziljs-16/#/
- https://github.com/willianjusten/audio-experiments
- https://guitar-tuner.appspot.com/
- https://github.com/googlearchive/guitar-tuner/blob/master/src/scripts/guitartuner-core.js
- https://hackernoon.com/a-web-audio-experiment-666743e16679
- https://sight-reader.herokuapp.com/
- https://github.com/davidgilbertson/sight-reader/