The Hummer Team one works with the NSFs and the Makon Soft one uses the raw ROMs. It still works with the .gbc format despite saying .bin in the example command. The Hummer Team one seems to have preset instruments for each Hummer Team default instruments, and as a result they sound pretty OK. The Makon Soft one is similar, but the MIDIs sound a little less good. They're both completely accurate though.
Not super useful, as Hummer Team and Makon Soft games aren't the best-sounding, but still useful. There's a ton of other MIDI conversion tools there too. https://github.com/ValleyBell/MidiConverters
I'd put this in the tool releases thing, but I didn't make these, so I'm putting them here. They also don't seem to have been intended for SMW hacking, but they work pretty well for that.
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