Filter 8

Review

Most multimode filters give you two or three output types and call it a day. Filter 8 provides all eight phase-shifted filter responses simultaneously: 1-pole LP, 2-pole LP, 3-pole LP, 4-pole LP, 1-pole HP, bandpass, band-reject (notch), and phase shift. All active, all patchable at once. This isn't a feature — it's an architecture.

The frequency range alone sets it apart: 2.8 millihertz to 27 kilohertz, a ratio of nearly 10,000,000:1. At one extreme, Filter 8 produces control-voltage-rate filtering for slowly evolving textures. At the other, it tracks well into ultrasonic territory. The resonance circuit is particularly well-designed — it can be driven hard without the bass-frequency loss that plagues most resonant filters, a flaw so common it has its own name in synth circles.

Drive the resonance into self-oscillation and Filter 8 transforms into an 8-phase sine wave VCO with temperature compensation, gain compensation, and clean 1V/Oct tracking over 5+ octaves. Eight sine waves spaced 45° apart from a single analog core — useful for complex modulation networks, spatial audio, or as a reference-quality sine oscillator. Joranalogue's engineering is uncompromising.