[jhbrandt]

Julian,

Is this your only room? Yes, your desk should go where you have your kit located... however, there's a huge difference between a mix/control room acoustics and drum room acoustics.

I understand that you have to use what you've got... putting 4" rigid fiberglass in the corners does not create a bass trap... maybe attenuates some bass frequencies - but you need to calculate and find your problem modal frequencies and go from there.

For instance; If you wanted to 'trap' say 120 Hz by using rigid fiberglass, you would probably need to use 3 - 4 panels in each corner. 2 panels going from floor to ceiling on each of the joining walls and 2 more panels from floor to ceiling on a radius pointing out from the corners.

In other words, you will need alot of space and alot of rigid fiberglass. - Also, traps like that usually suck out more than you want, especially at low mid frequencies.

You would be better off building a few Helmholtz type resonators with fiberglass damping. You can tune them for your problem resonances. The more damping you use - the more bandwidth they will have. Small, efficient, and effective. Cheap and fairly easy to build.

I hope this helps.
John