[ Thanks to robert1968 for this link.
]
“PianoBooster is a fun way of playing along with a
musical accompaniment and at the same time learning the basics of
reading musical notation. The difference between playing along to a
CD or a standard midi file is that PianoBooster listens and follows
what you are playing on a midi piano keyboard.“Introduction
“PianoBooster is a free (Open Source) program that plays
Standard Midi Files and allows you to change the speed of playback
and transpose the music etc. There is a scrolling musical stave
that shows the notes for just one part from all the parts in the
complete musical arrangement.“PianoBooster has been designed to allow you to play along on a
midi piano keyboard with the scrolling notes shown on the screen.
The notes you press on the keyboard appear as coloured lines on the
musical stave, the colour of which depends whether you have pressed
the right or wrong note.”