I totally agree! I think it’s a huge usability problem for people with sensitive ears. Even turning the volume down doesn’t help a lot, as you cannot disable the pitch.
I created a thread about it some time ago: Suggestion: Configurable stone effects but it didn’t get a lot of traction.
I even went through a simple exercise of filtering the high pitch from the stones out.
Standard https://www.chirbit.com/lemurek/playlist/a5a2d
Softened https://www.chirbit.com/lemurek/playlist/22dqN
What do you think?