MuteTone is a plug-in designed to provide a workaround the inability to shut off input monitoring in Pro Tools Vanilla. It will just cut the input signal whenever Pro Tools is recording, allowing you to use your external console, or sound card mixer for live monitoring with no latency.

It has been available as a freeware plug-in in RTAS format for a while now bt they now have released an AAX 64 bit version for Pro Tools 11 for the price of 1 Euro.