This 14minute video from RealTraps explains the basics of room layout and acoustic treatment, and presents practical solutions to many common problems. The focus is on home theaters, but all of the information applies equally to professional recording studios and mastering rooms.

If you have technical questions about this video that require a reply, please do not post them here as comments. YouTube is not a good venue for a technical exchange. Instead, please post your questions in whatever audio forum you know me from, or at my Audio Expert forum:

http://theaudioexpert.freeforums.net/