Marc, Yuhang
In entry 2545 the filter was not exported properly and was actually just a gain...
This time we used the proper filter and got the correct 4 open loop transfer functions of automatic-alignment as shown in the 4 attached figures.
It seems that for input & end pitch, the 11 Hz resonance is really too close to unity gain.
And the frequencies around 1 Hz have similar behavior.
We'll tune the filter in order to reduce this effect.