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Help needed using ETF (fool with a tool)

Posted by AVsponge (A) on May 17, 2004 at 23:46:34

I've read everything I can find on using a parametric EQ to attenuate spikes in the in-room bass response and I recently purchased ETF and a Behringer 2496 DEQ to try my hand at it.

While I am familiar with reading freq response graphs and waterfall plots, I just picked up the ETF software, and frankly I'm not getting the results I expected.

Even without putting my subwoofer into the mix, bass in my close-to-full-range speakers sounds hooty, boomy and resonant at times. However, looking at the ETF graphs, I'm not seeing the large spikes in the overall room response I thought I would, given what I hear. The ETF help files talk about using the gate time and time slices to help find the resonances. I think I know what I'm looking for, but again the resonances don't appear to cause any large spikes in the overall freq response. I've tried reducing the broader humps in the freq response, but all I get doing that is lower bass levels that still sounds ill defined and resonant.

My room is 13 x 19 X 8.75 feet.

I hear it is good to take multiple measurements, but I've also read that using a PEQ only corrects the response at one position. Where in the vecinity of the listening position do I take the extra measurements?

Any advice or a point in the right direction would be appreciated.

Cheers,

- Tim

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