Interesting alternatives Trevor. Not sure I’d picture frame a piece of cloth in my living room though. Good points on openings.
I think as long as you want to be surrounded by sound with no direction and don’t mine the loss of definition a lively room may actually enhance the effect. Objects and rugs would probably keep it reasonable. I’m thinking ambient sound. ... QS10s in mono.
Back in the day, I used to practice cello in a small (8x6?) practice room. If you clapped your hand it took 1 or two second for it to decay. The sound was grand and everywhere. I’d go as far as to say it was awesome.
