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.