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Graphic EQ. Week 2 PowerPoint. GRAPHIC EQ: Common type of EQ, has banks of SLIDERS to control specific FREQUENCIES Sliders can ADD or SUBTRACT dB Subtractive is usually better BANDS: Each specific frequency control CAR: May have as little as 2 bands (BASS and TREBLE)

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PowerPoint Slideshow about 'Graphic EQ' - arielle


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Presentation Transcript
Graphic eq

Graphic EQ

Week 2 PowerPoint


What is graphic eq

What is Graphic EQ?


Definitions

Definitions


Some 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.

Some History


Bss audio fcs 960
BSS Audio FCS-960 equalizer was in the Langevin Model EQ-251A which featured two passive equalization sections, a bass shelving filter and a pass band filter.


Dbx 215 dual 15 band
DBX 215: Dual 15-Band equalizer was in the Langevin Model EQ-251A which featured two passive equalization sections, a bass shelving filter and a pass band filter.


Behringer mini fbq
Behringer Mini FBQ equalizer was in the Langevin Model EQ-251A which featured two passive equalization sections, a bass shelving filter and a pass band filter.


Logic graphic eq
Logic Graphic EQ equalizer was in the Langevin Model EQ-251A which featured two passive equalization sections, a bass shelving filter and a pass band filter.


Waves renaissance eq
Waves Renaissance EQ equalizer was in the Langevin Model EQ-251A which featured two passive equalization sections, a bass shelving filter and a pass band filter.


Concepts 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

Concepts of EQ


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