idea - MOD KEY Keys2CCs Mode

[jdiercks]

Any thoughts/suggestions on this?

SETUP CTR > MOD KEY: KCC (Keys2CCs mode)

• if MOD key is pressed with no other keys held, send LEVEL CC = 127
• While MOD key is held
  • if another key is pressed, send (LEVEL CC + offset) = 127
  • if another key is released, send (LEVEL CC + offset) = 0
• if MOD key is released with no other keys held, send LEVEL CC = 0

notes

• to use MIDI Learn, first hold MOD, then enable MIDI Learn, then press key
• key sequence is significant; for example, if LEVEL CC = 102 (+=press,-=release):
  • +MOD+RH1-RH1-MOD = CC102=127,CC104=127,CC104=0,CC102=0
  • +MOD+RH1-MOD-RH1 = CC102=127,CC104=127
  • +RH1+MOD-RH1-MOD = CC104=0,CC102=0
  • +RH1+MOD-MOD-RH1 = (nothing)
• setting LEVEL CC to 102 uses a relatively “safe” range of non-reserved CCs (102-117)

CC offset map

Key	CC offset	Key	CC offset
RHs	1	LHb	8
RH1	2	LH1	9
RH2	3	LH2	10
RH3	4	LH3	11
RHp1	5	LHp1	12
RHp2	6	LHp2	13
RHp3	7	LHp3	14
specialKey	15

benefits

• enables up to 16 unique CC trigger messages with quick one-shot fingerings
• friendly to synths/DAWs with MIDI Learn functions
• possible to send messages as momentary on/off or one-shots for toggles
• infinite combinations of complex multi-key sequences possible with host scripting
• receiving host can detect relevant press and release events
• could be combined with PbUp/Dn or other sensors to intuitively adjust values
• could be useful for testing/troubleshooting hardware
• does not require modifying NVRAM data structure for storing settings

use case examples/ideas

• patch changes - faster than “fastpatch” :-)
• control effects like reverb & delay
• toggle internal patch settings/features
• host transport start/stop / looper controls
• quick host-side transpose (octave/semitone)
• host-based harmonizer/rotator
• “drum machine” mode
• sheet music / chord chart page-turner
• lighting cue triggers

[jdiercks]

I've started coding this, and rewrote the description above to reflect the actual implementation I'm landing on.