This is meant to be for me to learn how to use tone.js
- make a program with a button to play C major triad
- select instrument, wave table
- select ADSR
- make lots of buttons to play all kinds of chords
- make the buttons float around based on: current tonic, last chord played
- draw lines between chords to represent types of transitions
- https://tonejs.github.io/docs/r11/Param
- https://github.com/Tonejs/Tone.js/blob/dev/README.md
- https://webaudio.github.io/web-audio-api/
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