Graphic EQ Week 2 PowerPoint. What is Graphic EQ? GRAPHIC EQ: Common type of EQ, has banks of...
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Transcript of Graphic EQ Week 2 PowerPoint. What is Graphic EQ? GRAPHIC EQ: Common type of EQ, has banks of...
![Page 1: Graphic EQ Week 2 PowerPoint. What is Graphic EQ? GRAPHIC EQ: Common type of EQ, has banks of SLIDERS to control specific FREQUENCIES Sliders can ADD.](https://reader035.fdocuments.us/reader035/viewer/2022062407/56649f525503460f94c763bd/html5/thumbnails/1.jpg)
Graphic EQGraphic EQWeek 2 PowerPoint
![Page 2: Graphic EQ Week 2 PowerPoint. What is Graphic EQ? GRAPHIC EQ: Common type of EQ, has banks of SLIDERS to control specific FREQUENCIES Sliders can ADD.](https://reader035.fdocuments.us/reader035/viewer/2022062407/56649f525503460f94c763bd/html5/thumbnails/2.jpg)
What is Graphic EQ?What is Graphic EQ?
GRAPHIC EQ: Common type of EQ, has banks of SLIDERS to control specific FREQUENCIES
Sliders can ADD or SUBTRACT dBSubtractive is usually betterBANDS: Each specific frequency controlCAR: May have as little as 2 bands
(BASS and TREBLE)LIVE SOUND: 25 to 31 bands
![Page 3: Graphic EQ Week 2 PowerPoint. What is Graphic EQ? GRAPHIC EQ: Common type of EQ, has banks of SLIDERS to control specific FREQUENCIES Sliders can ADD.](https://reader035.fdocuments.us/reader035/viewer/2022062407/56649f525503460f94c763bd/html5/thumbnails/3.jpg)
DefinitionsDefinitions
THIRD-OCTAVE EQ: Most amount of bands. Each is a third-octave from the next
2/3 octave EQ: Second most bands.Less precise, but more general controlOften used to eliminate FEEDBACK
![Page 4: Graphic EQ Week 2 PowerPoint. What is Graphic EQ? GRAPHIC EQ: Common type of EQ, has banks of SLIDERS to control specific FREQUENCIES Sliders can ADD.](https://reader035.fdocuments.us/reader035/viewer/2022062407/56649f525503460f94c763bd/html5/thumbnails/4.jpg)
Some HistorySome History
Historically, the first use of slide controls in an equalizer was in the Langevin Model EQ-251A which featured two passive equalization sections, a bass shelving filter and a pass band filter.
Each filter had switchable frequencies and used a 15 position slide switch to adjust cut or boost. The first true graphic equalizer was the type 7080 developed by Art Davis's Cinema Engineering. It featured 6 bands with a boost or cut range of 8 dB. It used a slide switch to adjust each band in 1 dB steps.
Davis's second graphic equalizer was the Altec Lansing Model 9062A EQ. In 1967 Davis developed the first 1/3 octave variable notch filter set, the Altec-Lansing "Acousta-Voice" system.
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BSS Audio FCS-960BSS Audio FCS-960
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DBX 215: Dual 15-BandDBX 215: Dual 15-Band
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Behringer Mini FBQBehringer Mini FBQ
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Logic Graphic EQLogic Graphic EQ
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Waves Renaissance EQWaves Renaissance EQ
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Concepts of EQConcepts of EQ
In software: NOTCH filtering is a narrow band to pinpoint frequencies
SUBTRACTIVE EQ: Why is that better?Simple HI and LO pass: when are they used?What is OVER and UNDERSHOOT?Adjusting Q: What is it?What is LINEAR-PHASE EQ: Phase shift
introduced that is proportional to the frequency