There is a good Room Eigenmodes calculator and sound pressure visualizer at. Something is responsible for the bump but it's not apparent (to me) from a simple, i.e.Cross-Spectrum supplies the necessary calibration file. Although it's an omni-directional microphone, you need it calibrated specifically for this 90° position. That's because we don't want to reposition the microphone for each individual speaker sweep. Notice that the microphone is positioned vertically in the picture above, and not pointing at any individual speaker. I have the Cross-Spectrum UMIK-1 shown above. Cross-Spectrum sells a carefully calibrated version of this microphone for $100. Conveniently, REW from version 5.0 onwards can auto-detect the UMIK-1. A calibrated USB microphone to pick up the test tones REW generates.UMIK-1 mounted vertically via a Gitzo camera tripod at the listening position. The classic one I got on sale (see pic above) is no longer available. (Set on C weighting and slow response.) Radio Shack has a cheap one for under $30.
A sound pressure meter for REW SPL calibration.A total of two cables are attached to my laptop, as shown below. The connection is necessary to route the test tones generated by REW to your speakers. My laptop has a HDMI (digital) output that connects to my Pioneer receiver. (I bet it runs fine under Yosemite (10.10) as well.) How? Well, it is bundled with and makes use of JRE 8 inside its own folder in Applications. (On Mavericks, Java Runtime Environment (JRE) 7 is installed by default but REW uses JRE 8.) However, REW runs fine under Mavericks (10.9) on my Macbook Pro. Version 5.0.1 beta 24 is the latest version at this time. Sonus Faber Guarneri Mementos up front plus Cremona M center channel. All of the following information is available on the internet, e.g.
SOUNDFLOWER 64CH HOW TO
This post documents how to get it all up and running on a Mac. Would you like to know if your speakers are placed poorly in your room? Are there room resonance interactions you can avoid? If so, Room EQ Wizard, known as REW, is a incredibly useful and free program written by John Mulcahy for room analysis.
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