Some Piano App connects to a MIDI keyboard to help practice or show others what you're doing.
In realtime mode notes you play are stretched along the timeline so that others can see what keys you're pressing and for how long.
Load up a MIDI file and play along as the notes fly across the screen.
The main spark view shows a vertical stripe for each note aligned with the corresponding key.
The sheet music view attempts to draw notes on the grand staff.
Run
~$ ./gradlew run
Deploy
~$ ./gradlew jlink
~$ ./build/image/bin/rtp
IntelliJ integration run/debug integration works with no configuration.
