If it's not too much, I'd appreciate seeing AMK obtain MSU-1 support, considering how it's now handled by both snes9x and bsnes. It doesn't even seem like too much work from what I observed.
Here is a bunch of files I hope may be of some help (sorry for the mess by the way): the .zip includes the main MSU-1 patch (made SA-1 hybrid), main.asm and patch.asm to use with AMK 1.0.5 that Medic made, and main.asm and patch.asm to use with the latest AMK that I made by myself (1.1.0 5/7). I successfully made everything work on both SA-1 and non-SA-1 ROMs with AMK 1.0.5, but when it comes to 1.1.0 5/7 I get SFXs with a pitch 2x higher than it should be (rest works perfectly). I couldn't fix this nor properly implement the whole thing itself (did it in a very hacky way), so I leave all this in your capable hands. Hope you'll turn it into something awesome like you always do.