December 11, 2005

Subwoofer Phase Adjustment

A few nights ago, I noticed that the bass on the 4 Strings Turn It Around album was not synchronized with the higher frequencies. And today, while playing DDR, it was sometimes hard to keep the beat. So I decided to investigate.

As it turns out, Kodo's Ibuki album is an excellent source of material for determining subwoofer phase. With my previous subwoofer phase setting of 0°, a fair portion of this album seemed muddied. It sounded like there were a lot more drums than there actually are. During busy sections, it became hard to distinguish individual drumbeats. Switching my subwoofer phase to 180° immediately cleared up the entire album.

It was a lot harder to use AVIA to determine the correct phase, even though it can be done with very careful attention to the subwoofer phase calibration tone and corresponding description. The beats on Turn It Around are much better aligned now as well.

Posted by josuah at December 11, 2005 11:35 AM UTC+00:00

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