To re-animate this thread: I've read above posts re in/out dBs, but am not sure how this applies to my setup:
I'm using the Axoloti as external FX with my Xone 43C (http://www.allen-heath.com/media/AP9967_XONE_43C_USER_GUIDE.pdf).
Now, there are two issues:
a) Having a patch with straight audio through (i.e. stereo in -> stereo out), I'm observing a drop of 6db (i.e. XFX knob full dry = original signal; full wet = signal 6db lower). Why do I get this 6db drop?
b) If I insert a gain of 6db, the full wet signal is equal to the full dry, as it should be. However, with 50% dry and 50% wet, the signal slightly drops. Not much, but audible. Where could this drop come from? Speculatively, I could think of two things: Either non-linearities in the AD/DA conversion from in to out, or a slight decrease due to the introduced latency of the Axoloti.
The mixer spec doesn't say a lot, except for the output levels for X:FX send: 0dBu (Norm) +20dBu (Max).
Besides that, it all works pretty well. I've implemented a fair amount of Live 10's new echo effect (with a spare UC-33 as controller), and I'll make it available as soon as it's finished.