I think about making PCBs for this.
A mean little module from my JH-3 Modular.
6 filter poles, realzed with OTAs and combined FET / Bipolar buffer stages.
Variable Slope function for 6-pole VC LPF.
Voltage controlled Pole Spread for Phaser mode.
Zeroes switcahbel in pairs, i.e. a lot of combinations of all pass and low
pass stages. Positive and negative feedback. Positive and negative wet/dry
mix. Rather special overdrive behaviour (Dirty!), and (IMO) pleasant way of
breaking into oscillation.
Old picture (from JH-3):
http://electro-music.com/forum/phpbb-files/jh3_varislope_phaser_887.jpgDemo 1 (Arpeggio from OB-8, with delay and reverb. First few seconds dry -
then playing with phaser.):
http://electro-music.com/forum/download.php?id=16715Demo 2 ( This is something I recorded a few years ago. I don't remember all
the details. But it was a Split on the OB-8, bass sound on left hand and
organ sound on right hand, and the whole thing was processed with the
Variable Slope Phaser / Filter to get that "pulsating" sound.
Lots of delay and reverb as well, obviously.):
http://electro-music.com/forum/phpbb-files/oct_06_zwischenstand_edit_189.mp3JH.