tunable notch filter with variable Q + HPF?

Discussion in 'Effects [BG]' started by craigie, Aug 19, 2017.

  1. craigie


    Nov 11, 2015
    After a recent experience at a hall with a resonant frequency which doubled my volume near B/C, I've thought about getting a pedal with a variable notch filter to hunt down the offending frequency. A variable Q seems useful and of course attenuation level of the filter. Seems I don't encounter this situation enough to really worry about it or make too much of an investment. Too bad I got rid of the beringer DEQ I had....

    While I'm at it may as well have a variable HPF thrown in.

    Anybody know of an analog pedal or circuit plan with this functionality?
  2. LSMFT6

    LSMFT6 We brake for nobody Supporting Member

    Aug 16, 2006
    Tech 21 Q Strip? Not exactly what you're asking for but should do the trick
  3. craigie


    Nov 11, 2015
    Thanks. Looks interesting but only the mids are parametric. I already have a four band parametric EQ on my RH450. What I found by looking up the frequency of each knob is the bass one with the shift control tuned as low as can go gets down to around a C if I remember correctly. So maybe low enough in some cases to affect the fundamental of a problem note. Haven't had a chance to try that yet though. A tunable HPF would also be desirable.
  4. Stumbo

    Stumbo Guest

    Feb 11, 2008
    Last edited: Aug 20, 2017
  5. Snaxster


    Nov 29, 2008
    PZ-Preā„¢ Acoustic Instrument Preamp