More on moog filter band pass mode.

[Tony Allgood]

Hi,

re: my previous post.

Hot off the simulation... Band pass over audible range is -6dB/oct each
side of centre frequency. Equal amounts from top and bottom differential
amplifiers are subtracted. Use 1% resistors to summing amp, or a trimmer
pot to make sure both sides subtract ok. Odd that it should be
equivalent to 2-pole SVF. However, it sounds great.

Regards,

Tony Allgood, Cumbria, UK

e-mail: oakley at techrepairs.freeserve.co.uk

Rack mounted Moog VCF module. Details to be found at...

http://aupe.phys.andrews.edu/diy_archive/schematics/effects/filter.html