This is a very unusual device. It creates music in a semi random manner. You select a musical style, then press play, and it generates a piece in that style. You can then drop down into any part of the piece and change the instrumentation and the part itself. You can add samples as well.
The number of styles was quite extensive and a decent instrument bank too.
I found out about madplayer when they were still being sold new. A friend had one of these and told me about them. The files it generates can be exported as MIDI to a smartmedia card.
The device also works as an MP3 player, FM radio and recorder.
They don’t make these any more but you can still find them on eBay occasionally for about £50 or thereabouts.
If you check their website you’ll find that they plan to issue a Java based version. This perhaps might be usable on a palm or pocket pc? Who knows. I’ve been keeping an eye out, but nothing for a while now.