The FX Loop Mix value in the Profiler?
100%.
I think I'm getting there. I believe the issue is that having two digital pedals in series that both A/D-D/A the original signal, combined with the Kemper FX loop doing its own A/D-D/A conversion, creates enough latency to be very audible. My Eventide pedals have a global setting for KILLDRY ON/OFF which, when set to ON, produces a 100% wet signal with none of the original analog input. The problem is that if I set KILLDRY to ON in the first pedal in the series, the second pedal has no analog signal to process. And for some weird reason setting the first pedal to pass the analog signal but not the second one does not produce the desired result. But so far I can get one pedal in the loop with no latency.
The Eventide pedals also have a setting for either DSP or RELAY (analog) bypass, and I'm trying to understand how that setting interacts with the KILLDRY setting.
Onward!