Here I run you through how I built three acoustic diffusers for the rear wall of the studio. As long as you put the work into the prep this is actually a fairly simple project that looks great at the end. I looked at using commercial solutions for the studio but shipping large blocks of wood all the way to New Zealand added a lot to the cost. I enjoy making things so the DIY approach was more affordable and fun for me.
The software I used was Diffuser calculator - http://www.mh-audio.nl/user/acoustic%20calculator.asp
The DSP Project is all about music production and technology in the studio and on the stage. Host Rupert Brown reviews audio gear, gives tips & tutorials on electronic music production with Ableton Live as well as interviewing a range of music producers, audio engineers and other interesting people.