Streetfighter 2 conversion for MSX

From the video description:

As far as I know, the musics of this port are actually MIDI files, played by a piece of assembly that executes the data on MSX-Music (although using only one drum channel at a time).

Well, a big advantage of this is that no-one has to go through the hassle of arranging all that stuff. Since the MIDI files are available everywhere.

Regarding the samples, you can fit a lot more into the Moonsound RAM. Unless you got a huge expansion on your Music Module (which I think is usually not the case). And much better quality, ofcourse.

That's true, but I suppose in that case you'll need to sacrifice a chunk of sample RAM in order to have percussion (still using the sample-based synthesis component).
And I guess the original OPLL version would have to be maintained as well, to ensure that people who own an FM-PAC but not a Moonsound can still have music.

EDIT: I forgot that the Moonsound ROM has a General MIDI percussion kit aboard. But it still implies that the replayer would have to address the FM and 'wave' components simultaneously. And to be honest, I have no clue how hard (or easy) that would be in practice. What are your thoughts on this?

Would it perhaps be less CPU slurping if you'd still only use 6 FM channels + 1 wave channel and permanently disable the rest (meaning: modify the replayer so that it not even bothers with the unused channels)?