Just responding to a query related to this topic from clickflare (
http://www.dmdrummer.com/index.php?topic=6398.msg44114#msg44114).
The DM10's Chord function allows up to 3(x2) extra instrument layers for most trigger inputs (except the hihat and ride cymbals), and can be useful for creating custom sounds (like snare drums) when the A & B layer combos don't produce the sound you want. Although connecting a 'loop-back' cable between the DM10 Midi In & Out will cause a slight phase shift effect on the drum sounds.
This DM10 Midi note map (
http://www.hellfiredrums.com/wp-content/uploads/2010/07/DM10-Midi-Note-Map.pdf) shows spare midi notes available for the chord notes and they are accessible by scrolling beyond the instrument names on the EDIT INST page.
For example, on the EDIT INST>MIDI>CHORD/ARP page for any kit's SnrHd input, select Mode:CHORD and assign Note#2: 029(Conga Lo Open), Note#3: 062(Conga Hi Mute) & Note#4: 066(Timbale Low). Then try tweaking their level and tuning or maybe change the voice/s to Random Timbale sound/s, etc. Btw, if you're keen to try up to 8 sound layers the chord notes 'B' layers are available.
Also try different COMP settings like Jazz/Rok1/Crunch on the EDIT INST>FX page.
To compare the snare sound with and without the Chord notes, just change its Drum Chan number from 10 on the EDIT INST>MIDI page, which can also be useful to exclude the cymbals (etc) if required.
Maybe someone else is interested in experimenting with Velocity settings for the extra sounds, as suggested here:
http://www.dmdrummer.com/index.php?topic=4780.0 Enjoy your Christmas guys and hope the new year's a good one!