Let me be more precise. The gate reduces the signal level satisfactorily deep only at the threshold setting in extreme regions, where we can only talk about a classic "tonesucker" (so we can forget about the intact articulation). However, when we set the threshold in the desired region (so the gate closes only when we are not playing, but soft or gentle excitation of the strings immediately opens the noise gate) then when we are not playing the gain reduction is very small, literally a few decibels. When we set the threshold a little higher, the soft playing is muffled by the gate but still quite audible, and a stronger strike of the strings opens the gate completely, so the action of Muzzle is more like an expander than a gate.
I checked twice, I have no soldering mistakes.