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Parametric EQ

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

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Parametric EQ

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  1. Parametric EQ

  2. 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)

  3. 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

  4. 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

  5. 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

  6. 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?

  7. Presonus EQ3B • 3-band Parametric EQ

  8. Great River EQ-1NV • Up to 4 independent bands, selective EQ types

  9. 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

  10. Manley Massive Passive: Over $4,000

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