Instruo - I-ō47

I-ō47 Multimode Resonator/Filter is a modern take on a vintage circuit design inspired by the classic 1047 module of the ARP2500. It has been designed with some extra features like an additional inverted input and a strike input for pinging the filter. It offers four different slope outputs: lowpass, highpass, bandpass and variable notch output. The internal VCA’s are a new hybrid design of matched transistors and precision op-amps. With CV controllable centre frequency, resonance/Q and notch offset along side FM the I-ō47 is truly a filter for all occasions.

Features:

• Centre frequency range 16Hz to 16KHz
• 1V/octave, Coarse and Fine frequency controls
• FM input with attenuverter
• Low pass 12 dB/octave
• High pass 12 dB/octave
• Band pass 6 – 12 dB/octave dependent on Q
• Notch with variable offset –/+ 2 octaves
• Input with gain control
• Inverted input with resonance dependent gain
• Strike input for pinging the filter
• Feedback switch which adds BP to the input for enhances resonance
• Limiter based on tanh wave shaper which affects primary input (post gain fader)