SRQ wrote:I wasn't even aware there was a board needed- I just plug it into the gameport on any of my audio cards.
Processing unit? Am I missing things?
Well, sorta 😀
Roland sold their own MIDI interface, the MPU-401, which supported the full MPU-401 standard (obviously).
There are two modes, 'intelligent' and 'dumb'.
Many sound cards implement a MIDI interface that is MPU-401-compatible, but only in 'dumb' mode (intelligent mode is basically a whole on-board sequencer, and requires a microcontroller, making it expensive to implement).
So if you want the 'intelligent' mode as well, you either need to use the SoftMPU software (which emulates it on the CPU, requires a 386 or better), or you need the real Roland interface, or one of the few clones that support 'intelligent' mode.
I believe a few games depend on 'intelligent' mode, so just having the MT-32 alone won't give you the full experience.