This is interesting.
I finished putting in the Brazilian Cherry floor and it changed the acoustics of the shed quite a bit. It's not a solid hardwood, but rather a "laminate" (whatever that means .... either a thin layer of the real wood on top or something fake .... I can't tell, it looks incredible). It sounds much better now ... a very warm tone to the whole shed. It's actually pretty nice now (but probably still too bright).
Pointing the trumpet at the floor gives a warmer sound (by a lot) than pointing it at the SoundBoard walls. They are brighter, and more brittle ... I guess is a good way of describing it. I have yet to put in the futon which should also change the sound for the better. It's a lot of mass of soft material that a futon has. Maybe I can leave the floor the way it is and just treat the walls a bit with the Aurelex stuff.
A definite big surprise to me because I had just assumed the new floor would be BRIGHTER than the 3/4 inch thick plywood below it. Just the opposite. The plywood was brighter and not very good sounding. Maybe this shouldn't be a surprise ....... after all Cherry is a tone wood. I almost bought an acoustic nylon string guitar made of it. My entire floor is a tone wood now.