Building a Stereo Equalizer

adam0892 · 18th October 2011, 08:12 PM

Hello,

I am working on a project for class and am having trouble finding resources regarding building stereo EQs. I'm fine with IC and Op-amp designs but I don't want to have two sets of slider pots (one for each channel).

Can anyone point me to a good resource?
(I'm looking for 3-5 band parametric EQs)

mickeymoose · 18th October 2011, 09:27 PM

Go to Ethan Winer - Home Page and navigate to the mag. articles section, than "Spectrum Analyzer...." Most you need to know is there! E

dangus · 21st October 2011, 01:17 AM

One trick is to use VCAs (Voltage Controlled Amplifiers) to replace pots in a state variable filter. Analog Devices used to sell the SSM2164 quad VCA. Also check out THAT Corporation: Blackmer VCAs from THAT Corporation

stellavox · 21st October 2011, 02:33 PM

Try finding the National Semiconductor Audio Handbook. The second chapter - around page 50 has a thorough coverage of equalizers - especially pps 53-56. Or you can buy Douglas Self's new filter book.

Charles

18th October 2011, 08:12 PM	#1
adam0892 diyAudio Member Join Date: Oct 2011	Building a Stereo Equalizer Hello, I am working on a project for class and am having trouble finding resources regarding building stereo EQs. I'm fine with IC and Op-amp designs but I don't want to have two sets of slider pots (one for each channel). Can anyone point me to a good resource? (I'm looking for 3-5 band parametric EQs)

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18th October 2011, 09:27 PM	#2
mickeymoose diyAudio Member Join Date: Nov 2008	Go to Ethan Winer - Home Page and navigate to the mag. articles section, than "Spectrum Analyzer...." Most you need to know is there! E

21st October 2011, 01:17 AM	#3
dangus diyAudio Member Join Date: May 2004 Location: Vancouver Island	One trick is to use VCAs (Voltage Controlled Amplifiers) to replace pots in a state variable filter. Analog Devices used to sell the SSM2164 quad VCA. Also check out THAT Corporation: Blackmer VCAs from THAT Corporation

21st October 2011, 02:33 PM	#4
stellavox diyAudio Member Join Date: Jan 2007 Location: Oneonta, NY; USA	Try finding the National Semiconductor Audio Handbook. The second chapter - around page 50 has a thorough coverage of equalizers - especially pps 53-56. Or you can buy Douglas Self's new filter book. Charles

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