3band Parametric EQ, practical questions

[bvdl]

Hi,

I've built this pedal:
http://www.sabrotone.com/?p=578

This is the work in progress (I followed the Eq with a clean MOSfet boost from AMZ):


While testing I found out I might rethink the condesor for the lowend frequencies, but what bothers me most are following issues:

1: A slight high frequency noise. (Ca

[MrStab]

Edit: i saw 4 op-amps and assumed it was the totally wrong kind of circuit. ewps!

[antonis]

And plz resize your pics...

(we don't have a 100" screen.)