I’ve always believed that there is no “right” mix or “perfect” sound because we all perceive things a little differently, and our version of what sounds good may be completely different from someone else’s. Because of this I think that all of us who call ourselves sound engineers have a slightly different method of tuning and adjusting the equalization of our PAs. I like to use pink noise to make sure all of the various frequency bands (lows, mids, and highs) are even for the left and right side of the PA. Then I run some pink noise through the subs and lows to see what the response of the room is like when I boost some low frequencies. After that I blast the room with a quick shot of full-frequency pink noise to see what the reverb time of the room is. At this point I’m ready to listen to some program music on a DAT. I always use the same song or two so that I can relate what I’m hearing today to what my standard reference is. This is my method and I’m not saying it’s right, or the only way, but it has worked for me. One of the problems that can occur from using program music is if that song has certain particular frequencies that are predominate. This can give you a false reading of the PA system and room’s frequency response. You will usually learn what to look out for after using that song for a while, but what I suggest doing is “test EQing” (by boosting or cutting frequencies to see what effect they have) while the band is running through some songs during soundcheck.
You may sometimes have to explain yourself to the band as they may think something weird is going on (if they’re not in their plastic bubbles called “in-ear monitors”) as you’re boosting low-end momentarily in the house, but I think it is well worth the explaining. You can mould and shape the curve of your equalizers to fit the band’s frequency response in that room, that day. It’s also very useful for finding out what frequencies are harsh and bite-y on the top end. Try to do it quickly with quick bursts of boost and cut. While DAT tapes and pink noise are helpful for getting you close, the band you are mixing that night is going to determine how the PA should be tuned.
This article is excerpted from Jim Yakabuski’s book Professional Sound Reinforcement Techniques. Find it online at www.mixbooks.com and www.musicbooksplus.com.