Here are the changes 116 brings:
- Bug fixes made by Nordcore. (like 113)
- MIDI NRPN parameters editing fix. (like 114)
- Faster processing of parameter changes that need a modulation matrix rebuild, there's still a small lag but it's much better than before.
- Unison detune, controlled by MIDI CC #94 (Celeste Level), value from 0 (no detune) to 127 (strongly out of tune). It is always active, even in poly mode. Values around 2-6 add a slow VCO-like detune that helps liven up the sound and keeps poly mode sounding in tune.

See: http://gliglisynth.blogspot.fr/2014/11/matrix-1000-rom-only-upgrade-v116.html