A question about SBMIDI.

[na_th_an]

SBMIDI and SBSIM just install an interrupt you can use to communicate with a TSR which plays midi files. In order to do that, you must know how to use these interrupts (&H80 and &H81). Then comes QMidi. QMidi is just a library of SUBs and FUNCTIONs which provide a easy interface to communicate with SBMIDI TSR.

In sum: You need QMidi to use SBMIDI to play MIDIs. No digital sound here. You could also look for info about SBMIDI and code your own routines, but I'd suggest you to use QMIDI .