Work on my music room is not to start until a year or so from now (the missus thinks having a decent living room & bedroom is a more urgent matter...), but I am so curious about the nature of my corners. I've read tons and tons of material (mainly this forum and several other sources), and understand quite well the principles of accoustics, bass traps, mid and high freq absorbtion, and diffusion, but my question concerns a special case of corner bass trapping.

My room will be in the attic, with say 50cm hight of walls all around, and from there up the roof sloping inwards on three sides. The angle between wall and roof slope = 130°. Equally, instead of having 4 vertical corners between walls, I have 2 "sloping" corners where the roof sides meet; these also have an angle of around 130 to 135° (impossible to measure decently due to supporting construction).

Now all corner bass trap articles assume 90° corners, and most advise to tackle corners first as these give the strongest bass buid up. But what about the angle: does a 130° angle give birth to as much bass build up as a 90° one, or can it be regarded as something more toward a flat surface?

I do know that just walls also need bass trapping treatment to get the best results, and I intend to trap these wider corners anyway (possibly with two panel traps each side of the corner, which was indicated in one article as a space saving alternative to the regular corner trap). So the question may eventually be academic. But the subject just interested me, so if anybody can fulfill my lust for knowledge...

--------------------
Ever met a musically inclined accountant?