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BFD Equalisation question (1 Viewer)

Willem Vos

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Hi guys,

I've got a question about my BFD. I had set some filters, and was testing them with a Test-CD.
At some point the Test-tone started playing (at the point where I had set the filters), but it sounded like the BFD started EQ-ing too late, because it went loud then suddenly soft, like it had trouble EQing the sound.
Is this normal? I did have two filters set very close to one another...
 

Stephen Dodds

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Aug 29, 1998
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ARe you trying to boost or cut. If you are applying a bosst to a boost (which is generally a bad thing anyway), you may have overloaded the digital section.

Steve
 

Wayne A. Pflughaupt

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Are you trying to use the auto EQ function (someone correct me if it doesn’t have one)? If so, this is not the way to do it. The EQing needs to be done manually

Regards,
Wayne A. Pflughaupt
 

Willem Vos

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No I was trying to go the manual way, I had two filters, both set at PA.

I don't think I'm using the AUTO-EQ that way... How can I be sure?
 

Sonnie Parker

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Dec 11, 2001
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I don't believe the BFD has an Auto-EQ.

What exactly are your filters?

Frequency?
Bandwidth?
Cut or Boost?

I'm assuming your test tone CD is okay since you would have used it to measure your pre BFD response. Have you listened to the sub with music or a movie?
 

Willem Vos

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I don't believe the BFD has an Auto-EQ.
What exactly are your filters?
Frequency?
Bandwidth?
Cut or Boost?
I'm assuming your test tone CD is okay since you would have used it to measure your pre BFD response. Have you listened to the sub with music or a movie?
Hi Sonnie,

I don't remember my exact settings when it happened :), so I'll have re-create the event...
I'll post the settings as soon as I've got them.
 

Vince Maskeeper

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Lol- the entire point of the BFD for the real world is automatic seeking of feedback frequecies and eqing them away. It not only has the ability to do "auto" moves- but that's half the point it was built.

-V
 

Sonnie Parker

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I stand corrected for what it might be worth.

William, I suppose if you have feedback frequencies you could set the BFD to auto pilot and let it get rid of them.

Just kidding....

Suffice it to say, for the purpose you will use the BFD you probably won't be needing the auto-EQ, as the entire point for those using the BFD here in this forum is not automatic seeking of feedback frequecies.

I suppose maybe this forum isn't the "real world".
 

Vince Maskeeper

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Sorry- should have been more clear. The Behringer Feedback Destroyer was designed for professional audio applications, in order to automatically destroy feedback. I've been working in Pro sound for about 10 years, and so usually see the BFD as something that comes more from that world (although, Ironically, it is really not too popular there).

Again- apologies. My point was just that the BFD very much does have an automatic mode, and the manual filters were more of an afterthought (guess HT folks lucked out).

-Vince
 

Sonnie Parker

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No apologies necessary for me Vince... I understood where you were coming from. I probably should have made myself a little more clear. At the time though, I wasn't thinking (duh me!) along the lines of what is the original intent of the BFD. Although I do mention the original intent of the BFD in the BFD Comprehensive Setup Guide.

From the Guide page (notice I mention auto pilot-lol):
The BFD is more commonly used in recording studio’s and concerts, etc. It was not really designed for the home user. When setting up a studio or concert, the level is usually the same. Most concerts I’ve ever been to keep the volume level the same (very loud!) during the entire event. At home we vary our volume level because we have several different input sources and different listening levels at different times. Our sources are usually fixed outputs and in the audio chain prior to the pre/pro or receiver. The BFD is in the chain after the pre/pro or receiver. Plus we are not setting this on auto pilot and letting it search out frequencies to destroy feedback (as the name of the unit would imply), we are using it as a parametric equalizer to tame frequency peaks... we surely don’t want to eliminate them.
Maybe I should say: "I don't believe the BFD has an Auto-EQ function that will allow us to Auto-EQ our sub for HT purposes."

HT folks did kinda slip up and luck out on this one and at a bargain basement price. Which brings me to wondering who was the first person to use the BFD to equalize a sub and suggest it would be good for HT applications?
 

Willem Vos

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Nov 14, 2000
Messages
227
Well, I tried resetting the filters, but the "occurrence" :) did not happen again, so I guess it solved itself...
Could this have been due to setting one large filter? I read the BFD manual and it said it was better to divide one large filter into several smaller ones...
 

Sonnie Parker

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Dec 11, 2001
Messages
407
I don't see how one large filter could cause the problem you experienced, none the less, it's gone so I wouldn't worry.

My experience has been that with wider unequal peaks that several smaller filters work better than one large one. You can pin point the affected areas better and have better control.
 

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