Major Minor Seventh - Arduino Penny Organ Updates

Diary update on the penny organ. This device will have 2 modes - poly organ (4 note polyphonic keyboard) and chord organ (each note plays a 4 note chord). The chord mode will use modifiers for major/minor and octave/seventh.

Brett's video on Seventh Chords: https://www.youtube.com/watch?v=iTKvXW7lOHo

Help support Julian's electronic music videos via Patreon: https://www.patreon.com/julian256 ... https://www.youtube.com/watch?v=MdIfUeldIxg