With simultaneously present signals... Edit: I can also tune a guitar by plucking two strings at once, but I can't by plucking them one at a time. This really

With simultaneously present signals... Edit: I can also tune a guitar by plucking two strings at once, but I can't by plucking them one at a time. This really has nothing to do with noticing the absence or presence of a 3ms latency difference in a situation where your baseline is already dozens of ms of latency in the best case.