Why is the Gravis Ultrasound sound card supported more than General MIDI?
While General MIDI has much higher sound quality instruments, the number of instruments (and the instruments themselves) are fixed in nature; that is, you cannot change any of them. (If you don’t like the sound of a particular piano instrument, for example, you’re stuck with it.) MODs, and MOD-like formats (see FAQ 2.4) allow the composer to use whatever instruments he feels like. Also, General MIDI boards differ greatly in price and sound/instrument quality, and a song on one GMIDI board might not sound the same on another. Finally, General MIDI boards usually cost over $200 for a good quality one–which is usually unattainable, given the budget of most demo scene members.