This Module is currently available.
Custom LP filter with 8 phase-related outs / VCO / VC LFO + Mixer + Dual VCA
A 4-pole LPF inspired by the classic “cascaded OTA” design, but realized instead with superior-quality 2164 VCAs.
The sound is very reminiscent of classic Roland filters such as those found in the SH-101 or Jupiter-6.
The “octature” refers to the 8 distinct, phase separated outputs (every 45 degrees, or two sets of four 180-degree shifted outputs). each pair has a different slope: 6db, 12db, 18db and 24dB.
This filter was designed by David Dixon with a special resonance distribution mode called "QUAD" that results in an especially fat and warm LPF sound that is consistently balanced with respect to the resonance on all 8 outputs.
When oscillating this filter becomes an excellent clean sine wave VCO capable of tracking over several octaves. It can also operate in LFO mode where the phase shifted outputs become extremely useful for creative modulation.
This custom version includes a 3-input mixer with final attenuation at input of filter featuring a soft clipping circuit to help warm up and boost sounds before filtering. Also included is μVCA which is a dual VCA.
μVCA Features:
Continuously adjustable curve response (from linear to exponential)
Gain trimmer (it is possible to get positive gain)
Dedicated CV attenuators
Leds for monitoring CV signal
When no cable is patched to Out A, In A is normalled to Out B, offering a 2-channel mix.
That's an aweful lot of functionality for 3U! Thank you, Doc Sketchy!
