Most rooms don’t need acoustical treatment.

Ampa style setups need close to nothing. No back wall and tapered side walls and ceiling, no reflection points..

Setting up kitty corner, eliminates a lot of the normal treatment ideas and again the reflection points diminish. Room decay rates are much quicker.

Clutter counts :-) There are ways to reduce the UGLY as$ wall treatments diffusers, dust collecting stuff. Foam is hard to keep clean.

CURTIANS work and look the best to me..

It's easy to tune a room and liven it up just a bit with a curtain pulled open or closed a little more.. No studio looks for me.. 

Regards

Thanks, really got me thinkin’, look out.. LOL

Always wanted to be on a build team of a HUGE pipe organ, I’ve seen 3 of the BIG ones. I was a kid and saw the first two overseas.

The organ uses its set of pipes and there are tuning tubes and pipes for the chapels room tuning. Same principal. Perfect solution actually..

Some of the tubes are pretty long 5 stories, start in the basement (bellow room) and finish off at 64 feet. 10,000 tubes, of course there are only two at 64 feet in the world.. US and I think Down under. AU? 

Not quite that big, or that much tinkering, LOL

Thanks,

mahgister your Helmholtz devices, you are using them for bass EQ primarily? or ALL frequencies, 

Thanks ay..

Respectfully