I realized that WTRTI’s Aileron% feature allows for an objective demonstration of the difference between movement tab’s “Roll sensitivity” (which most recognize acts as a damping/filter instead) and axis sensitivty (set directly under the axis definition or under mousejoystick tab).
As we can see on this graph, setting axis sensitivity under mousejoystick header and and leaving it at 100% makes no difference in how long it takes for ailerons to deflect fully (landed P-38G without any trim). Returning to 0 is technically faster than to 100/-100% because I have a key that resets my virtual stick to center. Testing was done with STANDARD Mousejoy, 100% aileleron, 100% screensize, 0% deadzone.
Now, what if we instead look at setting it to roll sensitivity directly?
If you wonder why your plane wobbles like crazy (you pull nose onto target, and you seem to keep pitching up, which you compensate by pitching down and cue oscillation), this might be it if the text-based explanation on damping and filtering did not make sense.
Now, “What does the axis sensitivity do then?”
For mousejoy, it seems to, at first intention cause the mouse itself to move much faster as if you increased your DPI.
It has no effects beyond this.
Non-linearity does not appear to affect mousejoy inputs (moved my cursor to edge of gunsight, got same% roll at 4 and 1 non-linearities alike).
However, instead it looks like the “Aileron%” under mousejoy corresponds to maximum deflection (at 50% aileron, I can only get max 50%/-50% roll according to WTRTI.)
Further observation: Decreasing screensize significantly reduces mousejoy cursor sensitivity, making it feel very sluggish. Larger screensize increases cursor sensitivty.
Mouse joystick cursor screen place determines height of the cursor window. At 100% screen place and 0% size, it’s all the way down at your flight stick/yoke. This might be quite convenient for reducing screen-blocking/blindspots when using mousejoy but you can’t see your instruments as well (it conveniently seems to be right where your Turn & Slip indicator sits in most planes.)
Deadzone behaves as expected, it seems to offset the location of 50% aileron deflection by a centimeter or so on my screen (inside of the armoured glass frame to outside of it.)