tunable notch filter with variable Q + HPF?

craigie

craigie

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Nov 11, 2015
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#1
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?
 
#3
LSMFT6 said:
Tech 21 Q Strip? Not exactly what you're asking for but should do the trick
Click to expand...
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.
 
#6
craigie said:
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?
Click to expand...

PZ-Pre™ Acoustic Instrument Preamp
 
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