http://realtraps.com/art_room-setup.htm
http://www.soundonsound.com/sos/jul98/articles/acoustics1.html
https://en.wikipedia.org/wiki/Digital_room_correction
http://drc-fir.sourceforge.net/doc/drc.html
ACOUSTIC TREATMENT FOR HOME STUDIOS
Home Recording Studio: Build It Like the Pros By Rod Gervais Review