Designer Tim Caswell: "The 8106 is a 6db / oct hi-pass filter followed by a recreation of the Roland IR3109 module, which is a 4 pole, 24 db / oct voltage controlled lowpass filter with voltage controlled resonance. Three dual OTAs with similar topology to the BA662 used in the Jupiter 8 (and the IR3109 module) were employed, one amp for the hi-pass filter, four (with added buffers) for the low-pass, and one for the resonance. This filter takes a wide range of input signals, and tracks control voltage extremely well. Tap points are available for 6db, 12db, and 18db / oct. Although the topology is similar to the 4075, the tonality, especially when overdriven, is distinct."

Interface and feature Maestro Greg St. Regis, opted for the 6dB over the 12dB / 18dB "tap" for the second filter output, due to its colourful, and starkly contrasting character.

And yes, this INPUT drive hits harder - much faster than our other filters - so there is plenty of dirt to go around, but a familiar and comforting Roland-y quality / tonality / flow is definitely home base, especially with a nice SLIM O top-dead-centre square wave is riotously coursing and pulsing through the 8106's veiny through-hole circuitry.

7 Pots:
FREQ, RES, FREQ CV, RES CV, HPF, INPUT, OUTPUT

2 Switches:
FULL / HALF TRACK, 6dB / 24dB

Patch Points:
1V / O, FREQ CV, 6dB OUT, RES CV, INPUT, OUTPUT

- PCB Mounting Scheme: Through-hole
- Size: 12hp
- Depth: 38mm including connectors
- Power Usage: 40mA, 35mA (+12 / -12)