[sdiy] Graphic equalizers

[Dave Manley]

David G. Dixon wrote:
> I was just at the local second-hand music store in Vancouver, and there were
> several stereo graphic equalizers for $10 to $35.  Do these work as fixed
> filter banks for synths?  If not, it might be worth it just for the panel
> components.  One Technics model had lovely sliders, in a metallic finish
> very smooth action with a good solid detent in the middle...
>   
There's a nice write up about fixed filter banks on the yusynth site:

http://yusynth.net/Modular/EN/BANK/index.html

Simple graphic equalizer here:

http://web-ee.com/images/L01-greqcct.gif

The most obvious difference: an equalizer is (supposed to) have flat 
response with all pots centered, and each pot can provide boost/cut at a 
fixed frequency, while the fixed filter bank consists, ignoring the 
ends, of bandpass filters whose outputs can be individually mixed into 
the final output(s).  Agreed, for around $20, probably worth it for the 
case, power supply and raw parts.

-Dave