Conjured Circuits - JP6 Multimode VCF

Jupiter-6 Inspired Multimode Filter

The Roland Jupiter-6 is a 1980s analog polysynth with a great sounding multimode filter that is quite distinct from other Roland filters of the same era. Here it is recreated in a 2U Moog Unit module with an added 2-pole 12dB low pass mode, reminiscent of the Jupiter-8. As with most vintage Roland filters, it is based around a cascaded Operational Transconductance Amplifier (OTA), in this case using the LM13700 OTA in place of the obsolete Roland IR3109 quad OTA.

• 4 modes: 24 dB low pass, 12 dB low pass, band pass and high pass
  
• 2 audio inputs, logarithmic attenuated
  
• 2 frequency CV inputs, one unipolar input and one attenuverted input
  
• 1 resonance CV input, attenuated

System80 JOVE design licensed under exclusive waiver of non-commercial license.

• 15 mA +15V
• 10 mA -15V
• 0 mA 5V

https://soundcloud  com/conjuredcircuits/jp6-multimode-vcf-v10-production-unit-testing

(Copy paste link and add the . for a sound demo)