OK, you need two other things: pink noise, and some RTA software. There is freeware out there if you need it. I seem to recall the Allen & Heath site had one. It also helps to have an SPL meter. If you do, play the pink noise through your monitors and calibrate them to 85dBSPL C-weighted.
Next, close mic one of your monitors and perform an RTA on your monitors. This will give you a baseline for your room, since you have to control for your monitors.
Finally, place the measurement mic at your mix position. For a tracking room, also test various places where you would normally setup mics. Normalize the results and compare with the close-mic RTA graph.
Pay special attention to the bass frequencies. You need to set the RTA program to analyze at a fairly fine resolution. I use a little less than 1Hz between points in the bass region.
You should have results that tell you what nodes you have, where they are, and how bad they are. You can then take steps to mitigate the issues. You will also have learned something about the performance of your monitors.
But other than the paint, I think they are identical.
). I had to record the signal, then play it back while looking at my Voxengo spectrum analyzer software. I did learn a lot about what I'm hearing and where the problem spots are. The room was actually flatter than I thought, but my monitors are a bit bass shy. Just for the heck of it, I made an EQ preset in Gliss EQ that flattens out the problems. I don't mix with it, but I do put it on the master buss when I'm finished to listen for problems. It has made my mixes translate better, for sure.
