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RE: EQ 101 FAQ

DraDra Posts: 3,777
edited February 2010 in dbx Archive General Discussion
Here's a real world question.
How would you approach this situation?
Let's suppose you find a room that gives this result in the AFS.
Music High setting.
Filters at 175, 525, 675,690, 1.58k, 1.6k, 1.72k, 1.9k, 2.5k, 2.65k, & 8.5k. All reduced about 6-9db.

Assume a DR260, 9-band PEQ, AFS, & Notch modules available.

DRA

Comments

  • GadgetGadget Posts: 4,915
    More info would be required...

    I would need to see the room, but first impressions...

    525, 675,690,- Room modes
    PEQ 595 hz Q 2.035 -6.5

    175hz- mode
    PEQ 172hz Q 5.016 -7.0

    1.58k, 1.6k, 1.72k, 1.9k, 2.5k, 2.65k,- reflections
    PEQ 2K Q .0939 -6.5

    Clear, rerun AFS, the notches are probably too narrow to help

    How much above operating level and how many mics?

    Live or DJ? How many mics?

    So many qestions
  • DraDra Posts: 3,777
    I just pulled those #'s out of my hat. No room, only an exercise as to the approach.
    I entered the info into the PEQ and the band from 400 - 4kwas reduced by an average of 4 db or so. That is a lot of lost sound. I assume that because of the closeness of several of them that the problem is fairly wide AND OTHER FREQS ARE NOT TOO FAR BEHIND in the same band?
    Having said that, would it be better to use the same parameters but only reduce the gain to say... -3db and then let the AFS knock down the spikes of the room?
    What is the notch filter's real use, if too narrow for this purpose?

    DRA
  • GadgetGadget Posts: 4,915
    A broad Eq like that is surprisingly tame as compared to pulling individual frequencies on a GEQ... that as predicated by the fact that so many frequencies in a cluster that the mic position was suspect, but that if it was moved, more would crop up @ different center points.
    G
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