Hey guys. I have an issue I've been bangin' my head against the wall with for two days straight, and I am throwing out a Hail Mary that someone might have an idea what went wrong. First off, my set up basics. OS: Mac High Sierra, latest release DAW: Pro Tools 12, latest release, all plug ins, drivers, etc., updated Interface: Eleven Rack, Firmware 2, latest drivers. Connected to Mac via USB, with XLRs out to monitors. My hardware is more than up to the task, and ran flawlessly for over a year, so I wont bother you with those boring details. Ok, on to the mystery ... Everything was fine, for over a year, until two days ago. When I start the 11R, it plays through the monitors as it should, and the 11R stand alone editor functions as it should. When I load up Pro Tools ... The guitar signal seems to be "passing through" Pro Tools, as if the green Input Monitor button is always on. Turning the Input Monitoring on creates a short slap back echo effect, as I am then hearing both the passed through signal, and the signal going through PT. So its as if Input Monitoring is always on, and anyone familiar with PT knows that unless you monitor or record enable a track, there should be silence. Im sure this is a vague description, and if I get any responses, I will try my best to give more detail. And please, no wise ass / condescending "Use another DAW" comments. I am buttcrack deep in the PT world, and to change would be painful at this point. ** I've trashed my settings, did a PT reinstall, and checked and rechecked that everything associated with the hardware / software is up to date. Nothing helped, including Avids tech support. So I am hoping someone has a fix, or at least a workaround.