
just an idea that popped into my head. 24" X 80" door(pair) were $25ea in Home Depot. Line a wall of the vocal/live rm with something like this. either flat or in the form of triangles. Using standard indoor wooden shutters with one side FLIPPED UPSIDE down so that the half points up and the other half points down..........Line 702 or similar insulation behind them. Maybe even use shutters with different size slants? Maybe even use the adjustable shutters that you can open or close so you may select the level of absorption? If the fixed slants are used.......maybe seal some of the slant openings with acoustic calk. seal some all the way, some half way, some in the middle, some on the ends, leave some open?
What could you call it. Slot Resonator/Diffuser combo???

work?

Maybe a drum booth could look like this???
