Hi Walt --
I'm glad the information is helpful. I got curious about the "8Z Heavy Hearts" voice and took a deeper look.
The 8Z voices aren't drum kits. They are implemented as voices and are just a clever way of using the eight elements which make up a voice. The eight zones (8Z) are divided across specific note ranges.
Element# Note Low Note High Waveform
-------- -------- --------- --------------
1 C0 F#0 Bd T9-1
2 G0 C1 Bd Hard Long
3 C#1 D1 Sd Elec12
4 D#1 F1 Sd HipHop6
5 F#1 A1 HH Closed D&B
6 A#1 C2 HH Open T9
7 C#2 C4 Clap AnSm
8 C#4 C6 Shaker Hip2
Yamaha can play with each of the zones in crazy ways by tying keyboard notes to voice parameters. For 8Z Heavy Hearts, the most notable effect is how the Clap AnSm pitch follows the keyboard.
If I were going to create a style from the MOX/MODX MIDI data, I would assign appropriate drum kits (e.g., DrumMachine, Analog T9, House, Break or HipHop) to style parts 9 and 10 (MIDI channels 9 and 10) and copy the Heavy Hearts MIDI data to both Parts. Then I would delete the notes that I didn't want, compress each zone into a single drum instrument, and map the resulting "compressed" notes to the appropriate instrument. So, for example, all of the notes in C0 to F#0 might be compressed into the Kick T9 1 instrument (B0) in the Analog T9 Kit, assuming that is one of the target drum kits.
Hope that makes sense! It's easier to do than explain...
If three different drum kits are required, then I would assign kits to Parts 9 and 10 (which are typically style drums) and assign a kit to maybe part 12. I think the Analog T9 kit and the DrumMachine kits are enough to get started, though. These kits are built into most of the recent arrangers, so if you use common kits and share the style here, more people would be able to use the style without modification.
Effect-wise, I'd assign Lo-Fi as a SYSTEM-side variation effect and send both Parts 9 and 10 to the variation effect. Yamaha played with the Lo-Fi parameters:
Sampling Frequency Control 8.82kHz
Word Length 98
Output Gain 0dB
LPF Cutoff Frequency 12.0kHz
Filter Type PowerBass
Filter Resonance 6.3
Bit Assign 4
Emphasis On
Dry/Wet D<W24
Input Mode Stereo
The Lo-Fi Drum 1 preset is a good starting point.
Hope all this information helps out. The amount of detail in style programming and conversion is amazing and sometimes overwhelming!
All the best -- pj
P.S. Using that Lo-Fi setting on piano gives me a headache. :-)