Alesis VI25 MIDI CC codes discovery was done with aseqdump ( http://linux.die.net/man/1/aseqdump ) Button

Controller

Value

6 transport control: Control change 0

push → release

◄◄ ►► ■ ► ⇄ ●

127 → 0 127 → 0 127 → 0 127 → 0 127 → 0 127 → 0

116 117 118 119 115 114

buttons 1 .. 24: Control change 0

on → off

1 .. 8 9 .. 16 17 .. 24

127 → 0 127 → 0 127 → 0

48 .. 55 64 .. 71 80 .. 87

knobs 1 .. 8: Control change 0

left → right position

1 .. 8

20 .. 27

0 .. 127

modulator wheel

1

0 .. 127

Pitch bend

-8192 .. 8191

monophonic aftertouch

0 .. 127

e.g. button 1 push 28:0 Control change

0, controller 48, value 127

button 1 push 28:0 Control change

0, controller 48, value 0