Studio Electronics MODSTAR 8106 Filter

The 8106 Filter by MODSTAR is a 6db/oct hi-pass filter followed by a recreation of the Roland? IR3109 module��a 4-pole, 24db/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 colorful, and starkly contrasting character.

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