Based on the SONiVOX® Embedded Audio Synthesis (EAS™) library, which is
part of the base Android OS.
CPU stats (Cortex A8 1GHz, monkey1 intro, peak values):
MAME OPL: 30%
DosBox OPL: 26%
EAS: 19%
This code is currently not complete, but contains enough code to
allow several engines to switch their pseudo MidiDrivers to be
based on this class, greatly reducing code duplication.