Verbos Electronics Verbos Complex Oscillator
Buchla-inspired dual oscillator with harmonic waveshaping
32 HP Eurorack module
The Verbos Complex Oscillator is a dual-oscillator Eurorack module inspired by the Buchla 259 Complex Waveform Generator, featuring a primary carrier oscillator with a wavefolder and harmonic manipulation section, and a secondary modulation oscillator. It produces an extremely wide spectrum of thick, harmonically rich timbres through FM, waveshaping, and additive-style harmonic mixing, making every setting feel like a sweet spot.
Features
- Dual oscillator design with carrier and modulation oscillator sections
- Modulation oscillator is unipolar — requires external bipolar VCO for conventional bipolar FM
- Exponential FM via the internal FM modulation bus
- Linear FM available via direct patch to carrier
- Wavefolder with six individual harmonic controls (Harmonic 1-6)
- Harmonic Mix knob blends the harmonically folded signal
- Harmonic Shift knob shifts the harmonic content
- Individual CV inputs for each of the six harmonic controls
- Sync input syncs the Modulation oscillator to the carrier oscillator
- Multiple simultaneous waveform outputs: Sine, Sawtooth, Square, Triangle, Complex, All
- V/Oct tracking on carrier oscillator
- Inspired by the Buchla 259 Complex Waveform Generator
Controls & Jacks (36)
- Mod CV Atten— Fine-tunes the oscillator frequency
- Waveshape— Blends between different waveform shapes
- Mod Depth— Controls the amount of amplitude modulation
- Mod FM Atten— Controls the amplitude of the first harmonic
- Car Frequency— Sets the base frequency of the oscillator
- Mod Frequency— Controls the amplitude of the second harmonic
- Car CV Atten— Controls the amplitude of the third harmonic
- Timbre— Controls the amplitude of the fourth harmonic
- Even— Controls the amplitude of the fifth harmonic
- Master Out— CV control for harmonic content
- Car FM Atten— Controls the amplitude of the sixth harmonic
- Low— Controls the amount of frequency modulation applied
- Mod Index— Controls the modulation depth of waveshape
- Odd— Blends between harmonic selections
- Mod V/Oct— Pitch control via 1V/Oct standard
- Harmonics Out— CV input for harmonic 1 amplitude
- High— Shifts the harmonic content
- AM / FM— Selects oscillator mode or operation
- Harmonics Main Out— CV input for harmonic 2 amplitude
- Car CV In— Hard sync input from master oscillator
- Mod CV In— CV control for output amplitude
- Car Sub Out— CV input for harmonic 3 amplitude
- Car V/Oct— CV input for harmonic 4 amplitude
- Harmonics CV In— CV input for harmonic 5 amplitude
- Mod FM In— CV input for harmonic 6 amplitude
- Mod Waveshape— Controls the overall output amplitude of the oscillator
- Mod Sub Out— Frequency modulation control
- Car FM In— Complex harmonic waveform output
- Car Saw Out— Sawtooth waveform output
- Car Square Out— Square waveform output
- Mod Saw Out— Pure sine wave output
- Mod Square Out— CV control for waveshape
- Mod Waveform— Selects the frequency range of the oscillator
- Car Waveform— Controls the master output level
- Mod Section Out— Triangle waveform output
- Activity— Visual indicator of oscillator activity
How-To Guides
- Classic Buchla-Style FM Tone
- Harmonic Wavefolder Sweep
- True Bipolar FM with External Oscillator
- Hard Sync Harmonic Locking
- CV-Animated Harmonic Spectrum
- Pulsing Waveshape Bass
- Multi-Output Waveform Layering
- LFO Mode Modulation Source
- Internal Modulation Oscillator FM Drone
- Linear FM Timbre Control
Explore the interactive Verbos Complex Oscillator panel on BleepDex — tap any control to learn what it does.