Watch out though, while it's relatively easy (up to a point, depending on how reliable the SPC converter is able to determine the pitches of the individual samples) to generate a listenable MIDI from an SPC with a converter, the resulting MIDI is often extremely difficult to edit. The MIDI you got from me for "Beast II" for example, was actually a conversion, but I did quite a bit of editing on it before releasing. The editing was necessary for several reasons, most significant of which is that the converter had major issues handling stereo panning and volumes with that MIDI, thereby forcing me to do a whole bunch of adjustments there.
And more generally, editing is unfortunately pretty much a requirement since Ahribar wants perfect looping.
(Actually, I'm still not sure what to do with the special graphics music when it comes to looping, thanks to Cheapo's buggy handling of MIDI looping in general...)
==============
Still, feel free to make the conversions and post it here. I could use or not use them based on how much editing they'd need.