touchy

I wanted a way to visualize musical intervals within chords, in a layout that's not biased to a particular key (like a a piano style keyboard is).

This

• allows varied layout. So far I've played with
  • a few octaves of chromatic (see screenshot)
  • guitar and uke layout
  • isometric with thirds and fifths
• optionally mentions
  • note name (disabled in screenshot below)
  • Intervals to all touched notes
• colors by consonance (blue) or dissonance (red)
• reacts to multitouch
• reacts to MIDI input
• plays to MIDI

This is code leveraging the Kivy framework, because it's a very convenient way to quickly make this sort of experiment - the first functional version was under 100 lines.

Requirements

• Kivy
• loopMIDI (optional) is one way to route MIDI to a DAW

TODO

• change button behaviour

  • right now reacts twice
  • figure out whether/why changing button text makes it so slow to respond to lots of touches at once (is it relayouting?)

• actually add the code here

• figure out other realtimeish issues

• think more about the consonance/dissonance coloring

• packaging so I can offer download rather than 'please install these things'

CONSIDER

• make it react to sliding touch

  • as in, hit all buttons you pass, not just the one you land the touch on
  • consider strumming, pitch bends

• add on-screen config, e.g. swapping to other layouts, what to show on buttons, switching midi channel

• add file config (e.g. for what MIDI device name to prefer)

• think about other musical concents I want to explore with this

  • make it smart about chords?