MelodyMatrix is a commercial product with closed source, but the viewers are open sourced. These viewers are demonstration cases of what can be achieved with JavaFX user interfaces besides the `business apps` most people know.
The sources are available on GitHub and contain a test application to be able to try out and develop each of the viewers with random music data without the need of recordings are a connected MIDI instrument.

MelodyMatrix website

MelodyMatrix GitHub project
The JavaFX application that visualizes MIDI music, with its own e-commerce website.
Read moreOpen-source library that renders MusicXML and ABC scores on a JavaFX canvas.
Read moreLinks Of The Week and video interviews for the central hub of everything JavaFX.
Read more