We discovered that turning the damping off at the output of the DOF filter bank doesn't give the QUAD a kick (because it is more appropriately placed wrt the integrator).  So, to damp, you turn the input and output switches on, but to turn damping off, you must turn the output switches off first.  Then before running the TF, you turn the input switches off, then the output switches back on.  Coherence looks MUCH improved after a shot of damping in this manor.

A 2k signal swing on pitch appears to be as quiet as it gets (without damping).

Had to restart the DAQ (again) today.