Gmorgan is a midi processor, free software downloadable from Sourceforge.
The version that is incorporated into Ubuntu is old. Do not know why they do not update it, but you will find, if you download it from sourceforge, that the latest version is much better.
As far as I know, it doesn´t work in Windows. If you manage to compile and run it in Windows, please let me know.
You should have an updated browser if you have any problem listening to this.