A bit of a switch, using the MIDI card as a serial interface. It was common to use a Super Serial card or a //c serial port as a MIDI interface by doing timing in software. I remember one of Hal Chamberlin's demos at the WestCoast Computer Faire where he played a synthesized Bach Toccatta & Fugue from 8" floppy disks, each double sided disk holding about 30 seconds of music. Talk about disk jockeying - he was really busy swapping disks into his two drives. Keep your eye open for swap meets, Craigslist, and second-hand shops. I just bought a //e with disk drives for $20 from Goodwill.