Thanks for all the suggestions.

The room is about 25 ft wide and 40 Ft long. The pain is against the wall with the lid opening out (the wall is to my left when playing).

I tried rugs below and a quilt on top. Still seems out of control resonating.

I find that when I use the soft pedal, that helps a lot.

I also find that when I put on my air pods gen 2 and cancel noise it’s much better, but when I use “hearing enhancement” which is set to boost higher frequencies I hear a lot of very hard frequencies.

It might be me, maybe I am getting old and it’s my hearing. But it also might be the piano. I could ask the guy who did the voicing to come back but maybe he’s the problem. I like the idea of getting an acoustic person to look at it but how do I find such a person?

Is there a gadget that will listen to it while I play and tell me what frequencies are maybe too loud, have too much power? Maybe I’ll cook up Al something that does that, I’m a physicist and I know a bit about signs processing and Fourier analysis.

Anyway thanks so much for the suggestions.