intervals tool

Trying to make an intervals tool for chords scales, to be used away from the fretboard & keyboard.

Right now it's just HTML, the Salamander piano samples library, CSS, and Javascript. 

I'm going to add (or more accurately ChatGPT/Codex is going to add) some logic to the buttons to play certain intervals based on whether your moving up or down the chord scale; meaning, somehow the logic will have to determine whether you're moving down from 6 to 5 or moving up from 6 to 7, moving up from 4 to 5 or down from 5 to 4, etc. -- and then apply the correct intervals above the bass motion before triggering the correct audio samples -- yikes!