Midi Implementation

Source: the Rack 2X manual page 105 onwards. That section is reproduced here (I hope Clavia don't mind).

CC messages

Name	CC
Parameter	CC
Gain	7
Octave Shift	17
Mod Wheel Destination	18
Unison	16
Poly/Legato/Mono	15
Portamento Auto	65
Portamento Time	5
LFO 1 Rate	19
LFO 1 Waveform	20
LFO 1 Destination	21
LFO 1 Amount	22
LFO 2/Arpeggio Rate	23
LFO 2 Destination/Arp Mode	24
LFO 2 Amount/Arp Range	25
Mod Env Attack	26
Mod Env Decay	27
Mod Env Destination	28
Mod Env Amount	29
Osc 1 Waveform	30
Osc 2 Waveform	31
Osc 2 Semitones	78
Osc 2 Fine Tune	33
Osc FM Depth	70
Osc 2 Key Tracking	34
Osc Pulse Width	79
Osc Sync	35
Osc Mix	8
Amp Env Attack	73
Amp Env Decay	36
Amp Env Sustain	37
Amp Env Release	72
Filter Env Attack	38
Filter Env Decay	39
Filter Env Sustain	40
Filter Env Release	41
Filter Mode	44
Filter Cutoff	74
Filter Resonance	42
Filter Env Amount	43
Filter Velocity	45
Filter Key Track	46
Filter Distortion	80

MidiMix Mapping

This is how I assign the knobs on my Midi Mix to the Rack 2X (mainly thinking about controlling the Usual Suspects emulation). I'll probably do a similar assignment for the Mopho where possible (esp filter cutoff and env settings), though in the case of the Mopho I may want multiple mappings to choose between.

Faders

Filter Cutoff
Resonance
Env Amount
Velocity

Portamento Time
Keytrack
Dist

9 = Gain

Row 1

Amp Env ADSR
Filt Env ADSR

Row 2

Osc 1 wave
Osc 2 wave
Osc 2 semi
Osc fine, 

Osc fm
Osc keytrack
Osc pulse width
Osc mix

Row 3

LFO 1 Rate
LFO 1 Wave
LFO 1 Amount

LFO 2 Amount
LFO 2 Amount

Thoughts

At some point I may add the table for the patch dump format. Also if I find need, I may write some simple Python scripts to manage the Rack2X, and to e.g. copy/paste/modify parts of a patch between patches (e.g. take amp env from patch 1, apply it to patch 2, and write the output to patch 3).