Compact yet distinctive, Flow 3 is a filter that sounds bigger than it looks—and needs no help when it comes to modulation.
Flow 3 is a filter that sounds bigger than it looks. Behind the compact 6 HP front panel lies a novel variation on the classic state-variable filter topology, offering simultaneous lowpass, bandpass and highpass outputs. But the ace up Flow 3’s sleeve is its auto-dynamic nature: it is a filter that can modulate itself. This is achieved by a combined decay generator/envelope follower circuit which controls the filter frequency over an adjustable range.
Flow 3 is a filter that sounds bigger than it looks. Behind the compact 6 HP front panel lies a novel variation on the classic state variable filter topology, offering simultaneous lowpass, bandpass and highpass outputs. Core integrator saturation provides for a sound that’s clean, yet distinctive.
The resonance response is exceptionally smooth—and it can easily reach self-oscillation. In this mode, temperature-compensation and exact calibration make Flow 3 a reliable quadrature sine/cosine oscillator with tight pitch tracking.
Creating heavy-hitting analogue kick drum sounds becomes a breeze. And with a bit of patching, Flow 3 can even be used as a spectrum splitter (or ‘crossover’), cleanly separating the full audio range into low and high portions, for dual-band signal processing. This is possible thanks to the Linkwitz-Riley filter response at minimum resonance.
Let yourself get carried away as Flow 3 takes the old auto-filter concept to new voltage-controlled heights.
Features
- Analogue state-variable VCF with self-oscillation capability.
- Core integrator saturation adds distinctive character.
- Extra-smooth resonance with voltage control input.
- Filter outputs: 2-pole lowpass, 2-pole bandpass and 2-pole highpass.
- Self-oscillation: quadrature sine/cosine waves, separated by 90°, with temperature-compensated 1 volt per octave tracking.
- Integrated voltage-controlled decay generator/envelope follower for self-modulation.
- Decay circuit driven by external triggers and/or incoming signal amplitude.
- Envelope output can modulate other modules in tandem.
- Linkwitz-Riley crossover response unlocks dual-band processing possibilities.
- Impedance-compensated outputs with dual-colour vari-wave LED.
- Trim potentiometers accessible from the front panel.
- Precision-milled 2 mm anodised aluminium front panel with high-resolution, non-erasable graphics.
- Bullet-proof design: polarised power header and MOSFET protection circuit.
