BFD help

[cjpaul]

OK, I ran test tones and this is what I got.



So I got pretty agressive with the BFD and the result was this.



Obviously I did too much. I had about 9 filters and I was trying to both cut and boost. So if the first graph was your in-room response, where would you EQ?

PS, the VERY far left is 10hz, the vertical line under the text "EQ Gain" is 20hz, etc. in 10hz increments.

[ThomasW]

Start by using 'cut' only. See how much you can pull down to the -3dB to -6dB level

[cjpaul]

That's not working either. Using only cuts at the worst peaks, I get this.



That's not much better.

[ThomasW]

That actually looks pretty good.

A few things you need to understand.

First you're measuring with way too fine a scale (too small of increments unless you're using a $5K calibrated mic). And since the Behringer has limited EQ below 20Hz, fixating on 10Hz is futile. If you want flat with that fine a scale you need to buy a $5K Sabine processor.

Second perfectly flat is impossible and it doesn't sound very good.

Also moving the SPL meter 18" one way or the other can give you a completely different curve. So going for perfectly flat in one position isn't the best idea.

Why don't you download Room EQ Wizard and import the data into it? Then you can use it to 'virtually' flatten the plot and then manually transfer the settings to your BFD.

[cjpaul]

Thanks Thomas. I did download the wizard and played with it last night. These are the Freqs that PEQ uses and you have to have a number at these freqs to get the spreadsheet to work so that's what I use. You're right, it actually looks better than I thought afte only addressing the peaks. I wonder if I can get a boost in at that 67hz null or if its too room related. Bass traps are an upcoming project, just not sure where to prioritize them.

[ThomasW]

That's definitely a room created null. You should try a little boost. Sometimes one lucks out and can partially fill those kind of dips.