All of FabFilter Twin 3's parameters can easily be controlled using MIDI. Here is a list of
the default MIDI controller numbers that correspond to the parameters. You can use these
controller numbers to control each parameter with the sliders on your MIDI keyboard or MIDI
controller.
Not all parameters are linked to a CC number by default. Using the MIDI Learn feature, you can change and add CC number associations
any way you like.
74 - frequency 1
71 - peak 1
26 - frequency 2
27 - peak 2
Main EG
73 - attack
75 - decay
79 - sustain
72 - release
XLFO 1
76 - frequency
25 - balance
89 - glide
Notes
You can also consider using a MIDI source, which
provides a different way to use controller change messages.
In Twin 3, CC 64 (sustain pedal) is handled automatically, so you don't have to use a MIDI source to connect this to the EG Main Hold parameter like in Twin 2.