There is one major drawback:

Immidiatly after entering the the activity with "rotary" and turning the scroll wheel the click sound isn't deactivated.
I think it's because of the setting after the onRotary function.
So the click sound is still present.
After the onRotary function begins to run  (after fractions of seconds)
the rotary sound disappears just as wanted.
It would be better to place the setting before or at the beginning the rotary function but this doesn't work.
I think that it hasn't been properly thought out by Philips.

Fischi