MIDI embed demo

This uses the MIDI plugin. See about:plugins to see if it's installed and enabled. To enable a plugin, go to Options --> General Preferences --> Helpers and look for the audio/midi line, then Edit if necessary.

The MIDI plugin uses the Adagio MIDI player "mp", which must be on your path.
It plays this file : example4.mid

Embed is here:
Currently, the plugin blocks execution of Netscape while the music plays. Other tasks run, though, so you can always "killall mp".