Processing

Room EQ Wizard

As another indispensable part of my journey, I mainly use Room EQ Wizard, or REW in short, as my measurement suite. There are several other options available, I have picked this one. Over the time that I have been using it, the program has improved, lots of added features and its maker, John Mulcahy has always been listening to his userbase.

The more you learn a program, and its quirks, the more you can control what it does. So I’ve never been a fan to use different measurement suites, I’d rather learn and deal with what I’ve got, so I can learn to use it to its full potential.

That choice has not let me down in any way. Sure there are some surprises every now and then. But as said, once you learn its limits you can play with it. There often are graphical differences and even processing choices that differ from program to program. This measurement suite never was holding me back. In fact I feel I grew up with it, as more features arrived in time to go along with my learning curve.

As I have said in a previous post, you have to learn what it is you want your processing to do. To achieve that goal I first had to learn how to make, and even more important: interpret the measurements. There is more to it than glancing at a static frequency curve. I’ve learned to make use of basically every function this program has to offer to attain as much useful information as I could to learn what ‘sound does’ in my space. Learning to read the room has been the key to get better and better at adjusting the soundscape to my liking.

APL_TDA

Processing (APL_TDA graph)

The other measurement suite I use comes from Acoustic Power Lab and is called TDA, short for Time Domain Analysis. Wile the large bulk of my measurements are still made with REW, if I’m close to what I’d call “good enough” I may fire up APL_TDA to zoom in on the time domain specifically. It renders a detailed picture showing the wave front from my speakers plus the reaction of the room. Usually it allows me to see where I can optimize some more. The standard view you see here is a normalized wave front and it’s response from within the room. It is a measurement taken at the listening spot of both arrays and the sub-woofers. The fine tuning often is about how the mains hand over to the sub-woofers, which one can see clearly in a rendering like this.