Mixing : Basic Mixing : Using a MIDI Control Surface with Pro Tools : Enabling the MIDI Control Surface as an Input Device

Enabling the MIDI Control Surface as an Input Device
You must ensure that the MIDI control surface is enable as an input device in Pro Tools.
To enable a MIDI control surface as an input device:
1 Choose Setup > MIDI > Input Devices.
2 Select the source port that you selected in the Receive From pop-up menu in the MIDI Controllers page of the Peripherals dialog.
 
3 Click OK.
If you want to prevent control surface MIDI data from reaching Pro Tools, you can deselect its source port in the MIDI Input Enable window.