Paint that helps diffuse sound?

Lead paint have RFI shielding.
It also holds up much stronger than any other paint. I think it's still used to paint steel vessels.

I suspect blue walls would sound the best and green ceiling. Yes, I'm serious.

What if it doesn't sound good after you finish painting? Lots of things sound good on paper.

That's a very nice home organ setup referenced from what I read.

Whoever wrote the article might be willing to investigate the sound diffusing paint used in more detail if asked. I can't find any reference to such a thing via google search otherwise. I guess there are some things that cannot be Googled effectively. Which means, Machina Dynamica will be all over it. Ask Geoffkait about it or just keep an eye out there and see what might pop up.

Blue walls and green ceilings.

You can't make this up folks.