Expert Sleepers Ivo
Discrete OTA low-pass VCF with 2/3-pole switching
8 HP Eurorack module
Ivo is a 100% analogue resonant low-pass VCF using discrete transistor OTAs. Switchable between 2-pole (12dB/oct) and 3-pole (18dB/oct) responses with voltage control over both cutoff frequency and feedback (resonance). Self-oscillates in 2-pole mode. Features two summed audio inputs (one with attenuator) for built-in signal mixing at the filter input. Illuminated I/O jacks glow red for positive voltage, blue for negative, purple for audio.
Features
- 100% analogue signal path using discrete transistor OTAs
- Switchable 2-pole (12dB/oct) and 3-pole (18dB/oct) low-pass responses
- Self-oscillation in 2-pole mode for use as sine oscillator
- Approximately 1V/oct cutoff tracking (adjustable via internal trim pot)
- Voltage control over both cutoff frequency and feedback/resonance
- Two summed audio inputs with built-in mixing
- Three attenuators: Cutoff CV 2, Feedback CV, and Input 2 Level
- Illuminated I/O jacks show signal polarity (red=positive, blue=negative, purple=audio)
- 22mA +12V, 18mA -12V power draw
- 8HP, 37mm deep
Controls & Jacks (12)
- Cutoff
- Cutoff CV 2 Attenuator
- Feedback
- Feedback CV Attenuator
- Input 2 Level
- Cutoff CV In
- Cutoff CV 2 In
- Feedback CV In
- Input 1
- Input 2
- Output
- Poles
How-To Guides
- Acid Bass Line
- Dual Source Filtering
- Warm Pad Filter
- Pure Sine Generator
Explore the interactive Ivo panel on BleepDex — tap any control to learn what it does.
