RMF files

instead of me trying to explain this, I found a great explanation:

Rich Music Format (RMF) is a product of Beatnik, developed by Thomas Dolby.

This technology combines MIDI with prerecorded sound files to render high quality audio with small file sizes.

Most of these songs are used as WebTV background music. If you like these tunes, you will probably like the Webbie Zone.

New Classic & Plus WebTV (MSNTV) units already have RMF capability.

PC Users: Can't hear the music?
Download a Beatnik player.