Applies to all Audio Interfaces

This procedure will set Pro Tools I/O to correspond with the Audio Device or Interface selected in Pro Tools Setup > Playback Engine at the time.  Make sure you first select your Interface in Playback Engine.

Navigate to Pro Tools, Setup menu and click I/O. 

Select the Input tab then delete any paths that are there, once all paths are deleted

Click default (located at the bottom of the I/O window).

Select the output tab then delete any paths that are there, once all paths are deleted,

click default (located at the bottom of the I/O window).

Click OK on the I/O setup window, and you're all set to go.