Verbos Electronics Verbos Harmonic Oscillator
Additive oscillator with 8 individual harmonic faders
34 HP Eurorack module
The Harmonic Oscillator by Verbos Electronics is an additive synthesis oscillator providing direct, hands-on control over the first eight harmonics of a fundamental frequency. Each harmonic has its own fader and CV input, allowing precise sculpting of timbre in real time. The module outputs a composite waveform summing all harmonics, plus separate odd and even harmonic outputs for further processing. A scan CV input sweeps through the harmonics in sequence, creating animated, evolving timbres. Rooted in the West Coast synthesis tradition, the Harmonic Oscillator excels at creating complex, evolving tones without traditional subtractive filtering.
Features
- 8 individual harmonic level faders
- CV input per harmonic
- Fundamental through 8th harmonic
- All-harmonics summed output
- Odd harmonics output
- Even harmonics output
- Scan CV for harmonic animation
- 1V/Oct tracking
Controls & Jacks (55)
- Harm 8 CV Atten — Attenuverter for harmonic 8's CV input.
- Harm 6 CV Atten — Attenuverter for harmonic 6's CV input.
- Frequency — Master pitch control for the fundamental frequency. All harmonics track this pitch.
- Harm 3 Out — Individual output for harmonic 3.
- Harm 5 Out — Individual output for harmonic 5.
- Harm 4 CV Atten — Attenuverter for harmonic 4's CV input.
- Harm 5 CV Atten — Attenuverter for harmonic 5's CV input.
- Harm 7 CV Atten — Attenuverter for harmonic 7's CV input.
- Harm 2 Out — Individual output for harmonic 2.
- Harm 6 Out — Individual output for harmonic 6.
- Fund CV Atten — Attenuverter for the fundamental's CV input.
- Harm 4 Out — Individual output for harmonic 4.
- Harm 7 Out — Individual output for harmonic 7.
- Fund Level — Controls the base level of the fundamental frequency before the harmonic mix.
- Scan CV In — CV input for the Scan parameter. Modulates which harmonics are emphasized.
- All Out — Output with all harmonics at equal level, bypassing the individual sliders.
- High — High-frequency emphasis for the spectral tilt EQ. Boosts or cuts upper harmonics.
- Harm 2 CV Atten — Attenuverter for harmonic 2's CV input.
- Saw Out — Summed output of all 8 harmonics at their set levels. The main additive synthesis output.
- Harm 3 CV Atten — Attenuverter for harmonic 3's CV input.
- Harm 8 Out — Individual output for harmonic 8.
- Harm 1 Out — Individual output for harmonic 1 (fundamental). Useful for processing specific partials independently.
- Harm 1 CV Atten — Attenuverter for harmonic 1's CV input. Scales external voltage control of the fundamental level.
- Harm 7 Level — Sets the level of harmonic 7.
- Harm 7 — Indicates harmonic 7 output level.
- Harm 4 — Indicates harmonic 4 output level.
- Center — Sets the center frequency for the spectral tilt control. Harmonics above and below are affected differently.
- Harm 3 Level — Sets the level of harmonic 3 (octave + fifth above fundamental).
- Harm 5 — Indicates harmonic 5 output level.
- Low — Low-frequency emphasis for the spectral tilt EQ. Boosts or cuts lower harmonics.
- Tilt Offset — Manual offset for the spectral tilt. Shifts the overall spectral balance from dark (CCW) to bright (CW).
- Tilt CV Atten — Attenuverter for the Tilt CV input. Scales external voltage modulation of the spectral tilt.
- Harm 2 — Indicates harmonic 2 output level.
- Width — Sets the bandwidth of the spectral tilt effect. Narrow width affects fewer harmonics around the center.
- Scan — Scans through the harmonics sequentially, emphasizing different partials. Creates animated, evolving timbres when modulated.
- Harm 6 — Indicates harmonic 6 output level.
- Harm 3 — Indicates harmonic 3 output level.
- Harm 1 Level — Sets the level of harmonic 1 (fundamental). Controls the loudest, lowest partial.
- Harm 8 — Indicates harmonic 8 output level.
- Spectral CV In — CV input for spectral control. Modulates the harmonic balance/spectral shape.
- Harm 5 Level — Sets the level of harmonic 5.
- Harm 2 Level — Sets the level of harmonic 2 (one octave above fundamental).
- Harm 4 Level — Sets the level of harmonic 4 (two octaves above fundamental).
- Harm 6 Level — Sets the level of harmonic 6.
- V/Oct — 1V/octave pitch tracking input. For melodic control of the fundamental frequency.
- Harm 1 — Indicates the current output level of harmonic 1. Brightness tracks the partial amplitude.
- FM Input — Frequency modulation input. Modulates the master pitch for FM synthesis effects.
- Triangle Out — Waveform output shaped by the Scan control. Scanned waveform based on harmonic selection.
- CV Input — General-purpose CV input for harmonic level modulation.
- Tilt CV In — CV input for the spectral tilt. Scaled by the Tilt CV Atten knob.
- Harm 8 Level — Sets the level of harmonic 8 (highest partial).
- Square Out
- Odd/Even Out — Alternating output — odd harmonics from one polarity, even from the other. Useful for hollow, clarinet-like timbres.
- Mix Out — Summed output of all 8 harmonics at their set levels. The main additive synthesis output.
- Wave Out — Waveform output shaped by the Scan control. Scanned waveform based on harmonic selection.
Explore the interactive Verbos Harmonic Oscillator panel on BleepDex — tap any control to learn what it does.
