All of FabFilter One's parameters can easily be modified using MIDI. Here is a list of 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.
General
1 - modulation
7 - gain
Filter
74 - cutoff
71 - peak
26 - filter mod EG
88 - filter mod EG type
27 - filter mod MG
Oscillator
20 - scale
21 - waveform
22 - pitch/detune
23 - pulse width
85 - noise type
5 - portamento
24 - noise level
28 - frequency mod EG
87 - frequency mod EG type
29 - frequency mod MG
Envelope generator
69 - hold
73 - attack
75 - decay
79 - sustain
72 - release
Modulation generator
76 - modulation frequency
77 - modulation type
25 - modulation waveform
89 - sync mode
90 - sync type
Additional features
103 - polyphony
86 - pulse width modulation type
105 - filter keyboard track
104 - velocity volume
102 - velocity filter
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