by, who is indebted to Jan Vriend and Jan Pieter Kunst. Version 2.0.1. Documentation.
Originally written in Pascal (1993); PHP port & web interface ©
2006-2023 by Jan Pieter Kunst. Source code available on Github.
MIDI support: Midi Class 1.6 by Valentin Schmidt and MidiPlayer by chenx.
MIDI playback does not seem to function in Safari. Working on it.
Format something like: d4-g#4-c#5, or f4db4bb3ab4,
each note name to be ended by its octave position digit (a440 = a4)