The Mix control just works as a Send, over much of its range. This is the standard behavior for the mix knob:
Steep End Drop—The dry signal is constant(not attenuated) until 50% Mix then gradually lowers until about 3 o'clock, where the dry signal starts to drop off more steeply. At 100% Mix, the dry signal is muted. For reverb or echo, this results in a perceptually constant level along with the ability to roll over to 100% wet signal at the end of the Mix range.I usually have the mix control on my pedal set to 2:00-3:00, and use an expression pedal to adjust the mix.
So conceptually like a volume pedal in front of a 100% wet reverb? No, it can't do that. What it can do is really useful, though, IMO.Aha, OK. That makes sense. So it sounds like the one thing you can't do is have variable send-like expression AND have the mix 100% wet? (Seems that the space echo may be the only one able to do that trick...)