Tapped 4pole Filter

[Tony Allgood]

Are we talking Moog ladder here? I posted a few of my findings a while
back on this very subject. Subtract the two diff amp outputs and you get
a band pass, which is nice. Someone, I think it was Martin C, had
actually worked this out using the maths, s plane stuff, and could get
most filter responses by mixing the four taps in different amounts. I
guess it would work on the TB filter as well. Now there's a thought.

Today, I found a Jean Michel Jarre album that I'd bought long ago but
had forgotten all about. Then I played it... and understood why I forgot
about it. Terrible. 'Revolutions' for those who want to know.

Regards,

Tony Allgood, Cumbria, UK

Rack mounted moog filter and the TB3030 SuperBassline projects:

http://aupe.phys.andrews.edu/diy_archive/schematics/oakley/