I'd like a possible sound resource editor or some type of viewer/player. Maybe something like Soundbox built right into SCI Companion. Maybe not with the ability to edit the notes themselve per se, but the ability to assign a channel to a specific patch output (ie- MT-32, Adlib, Tandy 3 voice, PC Speaker, etc).
I know that's a huge thing to ask, though, and a project in itself, really. For a small addition, even a simple player with the ability to play any of the patch versions of a specific sound resource (MT-32, Adlib, PC Speaker, etc) with an dropdown menu for selecting the desired output (MIDI output, SoundFont, digital audio, whatever).