Expert Sleepers Ivo - Resonant Low-pass VCF [Three Wave Music]

'Ivo' is a resonant low-pass VCF (Voltage Controlled Filter), switchable between 2-pole (12dB/octave) and 3-pole (18dB/octave) responses, with voltage control over feedback (resonance) as well as cutoff frequency. It will self-oscillate in 2-pole mode.

The module has two audio inputs, one with an attenuator, so it will also mix two signals at the filter input.

The module is 100% analogue, using discrete transistor OTAs.

Specifications Ivo's specifications are as follows:

• Panel width: 8HP
• Module depth: 37mm
• Current draw: 22mA on the +12V rail, 18mA on the -12V rail
• Inputs:
• • Cutoff (approximately 1V/octave)
  • Cutoff (with attenuator)
  • Feedback (with attenuator)
  • Audio input
  • Audio input (with attenuator)
• Outputs:
• • Audio output