verbos/harmonic-oscillator
Harmonic Oscillator
Discrete all-analog triangle core VCO with outputs for saw, square, triangle and each of the first 8 harmonics, plus a voltage controlled mixer for mixing the harmonics to create evolving timbres.555
Capabilities 5
- Additive Synthesisadditive-synthesis
- Sum-of-sines additive voice — the 8 sine harmonic outputs plus the per-harmonic VCAs and the harmonic mixer realize additive synthesis directly in the analog domain.555
- Fader / Slider Bankfader-bank
- Additive oscillator with a bank of faders mixing the first 8 harmonics — the harmonic-amplitude fader bank is a defining feature.
- Harmonic Oscillatorharmonic-oscillator
- Outputs the first 8 harmonics of the fundamental as individual sine waves, plus standard triangle / sawtooth / square taps. Each harmonic amplitude is independently CV-controllable; the on-board voltage-controlled mixer combines them via scan / tilt / mix CVs into a single mixed output.555
- Voltage Controlled Mixervoltage-controlled-mixer
- On-board VC mixer combines the 8 harmonic VCAs into a single mixed output, with scan (which harmonic is loudest), tilt (spectral skew), and mix (overall blend) all CV-controllable.555
- Voltage-Controlled Oscillatorvco
- Discrete all-analog triangle core VCO ranging 3 Hz to 20 kHz with 1V/oct, linear FM, and exponential FM inputs.555
Jacks 26 (14 in / 12 out)
| Name | Signal | Voltage | Description |
|---|---|---|---|
| Inputs (14) | |||
| 1V/Oct | cv | — | Calibrated 1V/octave pitch CV input.555 |
| 1st CV | cv | — | CV input controlling the level of the 1st harmonic in the mixed output.555 |
| 2nd CV | cv | — | CV input controlling the level of the 2nd harmonic in the mixed output.555 |
| 3rd CV | cv | — | CV input controlling the level of the 3rd harmonic in the mixed output.555 |
| 4th CV | cv | — | CV input controlling the level of the 4th harmonic in the mixed output.555 |
| 5th CV | cv | — | CV input controlling the level of the 5th harmonic in the mixed output.555 |
| 6th CV | cv | — | CV input controlling the level of the 6th harmonic in the mixed output.555 |
| 7th CV | cv | — | CV input controlling the level of the 7th harmonic in the mixed output.555 |
| 8th CV | cv | — | CV input controlling the level of the 8th harmonic in the mixed output.555 |
| Mix CV | cv | — | CV input for voltage-controlled overall blend/mix of the harmonic mixer output.555 |
| Scan CV | cv | — | CV input for voltage-controlled scanning of the harmonic center/width position.555 |
| Tilt CV | cv | — | CV input for voltage-controlled tilt (spectral balance) of the harmonic mixer.555 |
| c.v. input | cv | — | Exponential FM CV input; routed through a reversing attenuator before exponential pitch modulation.555 |
| f.m. input | cv | — | Linear FM input; routed through an attenuator before reaching the frequency modulation path.555 |
| Outputs (12) | |||
| 1st | audio | — | Sine wave output for the 1st harmonic (fundamental).555 |
| 2nd | audio | — | Sine wave output for the 2nd harmonic.555 |
| 3rd | audio | — | Sine wave output for the 3rd harmonic.555 |
| 4th | audio | — | Sine wave output for the 4th harmonic.555 |
| 5th | audio | — | Sine wave output for the 5th harmonic.555 |
| 6th | audio | — | Sine wave output for the 6th harmonic.555 |
| 7th | audio | — | Sine wave output for the 7th harmonic.555 |
| 8th | audio | — | Sine wave output for the 8th harmonic.555 |
| Mixed | audio | — | Voltage-controlled mixed output of all 8 harmonics combined via the harmonic mixer.555 |
| Saw | audio | — | Fundamental sawtooth wave output from the oscillator core.555 |
| Square | audio | — | Fundamental square wave output from the oscillator core.555 |
| Triangle | audio | — | Fundamental triangle wave output from the oscillator core.555 |
Parameters 14
| Name | Type | Range | Behavior |
|---|---|---|---|
| 1st harmonic level | fader | — | 555 |
| 2nd harmonic level | fader | — | 555 |
| 3rd harmonic level | fader | — | 555 |
| 4th harmonic level | fader | — | 555 |
| 5th harmonic level | fader | — | 555 |
| 6th harmonic level | fader | — | 555 |
| 7th harmonic level | fader | — | 555 |
| 8th harmonic level | fader | — | 555 |
| c.v. attenuator | menu_setting | — | Reversing attenuator (attenuverter) on the exponential FM CV input; routes the signal to exponential pitch modulation with polarity control.555 |
| center | menu_setting | — | Sets the center position of the harmonic scan window, sweeping which harmonics are active like a bandpass filter.555 |
| f.m. attenuator | menu_setting | — | Attenuates the linear FM input signal on its way to linear frequency modulation of the oscillator.555 |
| Frequency | menu_setting | 3Hz – 20000Hz | Sets the oscillator frequency from 3 Hz to 20 kHz.555 |
| tilt | menu_setting | — | Spectral tilt control: turned up favors higher harmonics and reduces lower ones; turned down favors lower harmonics and reduces higher ones; centered has no effect on the harmonic mix.555 |
| width | menu_setting | — | Controls the width of the harmonic band selected by the center control, sweeping harmonics across like a bandpass filter.555 |
Firmware history 0 versions
No firmware history recorded.
References 2
- [555]
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[556]
Verbos Harmonic Oscillator product pageproduct_page⚠ verified 2026-05-19 · manufacturer changed since last verified