 Parametric EQ. How does it differ from Graphic EQ?  Main difference: VARIABLE rather than FIXED Frequency  Involves a BAND-PASS FILTER  Can control:

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Presentation transcript:

 Parametric EQ

How does it differ from Graphic EQ?  Main difference: VARIABLE rather than FIXED Frequency  Involves a BAND-PASS FILTER  Can control: AMPLITUDE, Center Frequency, and Bandwidth (Q)

History  Introduced in 1972 by GEORGE MASSENBURG  Was very innovative because it can make PRECISE modifications to EQ  Has become extremely popular in DSP (Digital Signal Processing) such as in Plug-ins  Sometimes called PARAGRAPHIC EQ

Semi-Parametric EQ  Same as Parametric, but has limited features  Usually has a pre-set BANDWIDTH, meaning that you can’t adjust the “Q”  This is common on MIXERS

Popular Uses  ENHANCEMENT: A Parametric EQ can enhance, boost, or add harmonic distortion to a chosen frequency  RESONANCE: An engineer can either boost or reduce a particular point of resonance  REDUCING NOISE: Eliminate any extraneous sounds  LIVE SOUND: Preventing feedback or room correction

QUESTIONS  What are the ADVANTAGES and DISADVANTAGES of using either a parametric or graphic EQ?  What is the benefit of a DSP-based EQ?  What is the benefit of a Tube EQ?  How much should an engineer rely on EQ?

Presonus EQ3B  3-band Parametric EQ

Great River EQ-1NV  Up to 4 independent bands, selective EQ types

SSL EQ Module  Like on our mixer here  High, High-mid, Low-Mid, and Low  4-band with “Q” on two center bands  High and Low are High or Low PASS  Can select or bypass

Manley Massive Passive: Over $4,000