ceithir

Instruō's quad stereo state-variable filter and resonator in 58 HP: four analogue filter cores, alpha to delta, each a state-variable filter, a resonant sine oscillator or a pitch-trackable resonator, with low pass, band pass, high pass and notch outputs, a morphing stereo pair, input and output limiters and a strike input. Four internal triangle LFOs drive stereo enhancement, frequency modulation or animation, and a master section sets the global cutoff, the levels and the stereo mix.

Key features

• Four state-variable filters: Filter, Res or Osc mode, LP, BP, HP and N outputs
• Morph and Width: a stereo pair per filter, all-pass stereo enhancement
• Strike input pings each filter's resonance
• Four internal LFOs routed by the modulation bus switches: ANIMATE, OFF or FM
• Parameter link α→β and δ→γ, global 1V/OCT inputs and MASTER fc
• Levels with CV, master stereo outputs, sum or Uber Stereo, master limiter