I'm playing with a platform port that only has about 10 MIPS of mighty CPU 'grunt' to play with

Although the game graphics are rendered (320x200) at full speed and the SFX is working fine the MIDI emulation is struggling badly.
Unless it's a silly bug in my port (always possible!), I assume it's because 10 MIPS is simply not enough to run the MIDI emulator and do everything else it needs to do.
Is there anything I can do at code-compile time to make the MIDI emulator run faster by lowering the quality?
Otherwise, is it possible for the ScummVM team to add a new 'low CPU usage' quick-and-dirty type MIDI emulator to ScummVM for us low power users?
I've tried both the DosBox and MAME emulators and MAME seems to need more CPU than DosBox.
Thanx
