Behringer System 100 110 VCO/VCF/VCA
Complete analog voice: VCO + resonant VCF + VCA in 16HP
16 HP Eurorack module
The Behringer System 100 110 VCO/VCF/VCA combines a voltage-controlled oscillator, a resonant low-pass filter, and a voltage-controlled amplifier in a single 16HP module. Based on the classic Roland System 100M architecture, it provides a complete analog voice in one panel. The VCO offers triangle, sawtooth, and pulse waveforms with manual PWM control. The VCF uses slider controls for cutoff and resonance, capable of self-oscillation. The VCA provides separate low and high-level outputs with LED metering. Each section has dual CV inputs with attenuators, enabling complex modulation routings.
Features
- Complete analog voice path: VCO → VCF → VCA in one module
- Based on the Roland System 100M circuit design
- VCO with triangle, sawtooth, and pulse (with PWM) waveforms
- Five-position Range selector: 32', 16', 8', 4', 2'
- Dedicated PW MOD input for pulse width modulation
- Resonant low-pass VCF with slider controls for cutoff and resonance
- VCF self-oscillates at maximum resonance
- Dual signal inputs on both VCF and VCA for mixing
- VCA with separate LOW and HIGH level outputs
- LED metering on VCA outputs (red for LOW, green for HIGH)
- Initial Gain control for VCA bias level
- Dual CV inputs with attenuators on all three sections (6 total)
Controls & Jacks (33)
- PW MOD IN — CV input for pulse width modulation of the VCO square wave
- VCO OUT — VCO audio output
- Manual — Manual pulse width control. Sets the duty cycle of the pulse wave from 50% (square) to narrow pulse
- Waveform — Selects VCO waveform: triangle, sawtooth (ramp), or pulse (with PWM)
- Range — Octave range selector: 32', 16', 8', 4', 2' (low to high)
- Pitch — Fine pitch tuning control for the VCO
- VCO CV 1 — Attenuator for VCO modulation input 1
- VCO CV 2 — Attenuator for VCO modulation input 2
- VCO Mod In 1 — VCO CV/modulation input 1
- VCO Mod In 2 — VCO CV/modulation input 2
- VCF SIG IN 1 — VCF audio signal input 1
- VCF SIG IN 2 — VCF audio signal input 2
- VCF Level 1 — Input level attenuator for VCF signal input 1
- VCF Level 2 — Input level attenuator for VCF signal input 2
- Cutoff — Filter cutoff frequency slider (0-10)
- Resonance — Filter resonance slider (0-10). At maximum, the filter self-oscillates
- VCF CV 1 — Attenuator for VCF modulation input 1
- VCF CV 2 — Attenuator for VCF modulation input 2
- VCF Mod In 1 — VCF CV/modulation input 1
- VCF Mod In 2 — VCF CV/modulation input 2
- VCA SIG IN 1 — VCA audio signal input 1
- VCA SIG IN 2 — VCA audio signal input 2
- VCA Level 1 — Input level attenuator for VCA signal input 1
- VCA Level 2 — Input level attenuator for VCA signal input 2
- VCA OUT LOW — VCA low-level audio output
- VCA OUT HIGH — VCA high-level audio output
- LOW — Red LED indicating signal level at the LOW output
- HIGH — Green LED indicating signal level at the HIGH output
- Initial Gain — Sets the base VCA gain level. At maximum the VCA is fully open without CV
- VCA CV 1 — Attenuator for VCA modulation input 1
- VCA CV 2 — Attenuator for VCA modulation input 2
- VCA Mod In 1 — VCA CV/modulation input 1
- VCA Mod In 2 — VCA CV/modulation input 2
How-To Guides
- Classic Subtractive Voice
- Self-Oscillating Filter Bass
- PWM Pad
- Dual-Source Filtered Mix
Explore the interactive System 100 110 VCO/VCF/VCA panel on BleepDex — tap any control to learn what it does.
