Building a Stereo Equalizer

[adam0892]

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]

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]

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]

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