xaoc-devices/odessa
Odessa
Additive oscillator synthesizing up to 2560 sinusoidal partials; shapes harmonic/inharmonic spectra via tilt and warped comb response; supports up to 5 detunable unison voices; 0.5Hz to 21kHz frequency range; three signal outputs.651
Capabilities 2
- Additive Oscillatoradditive-oscillator
- Up to 2560 sinusoidal partials with spectral shaping via tilt, comb density/warp/peaking, and tension; up to 5 detunable unison voices.651
- Through-Zero FMthrough-zero-fm
- AC-coupled linear FM input accepting up to 10Vpp; depth set by slider; modulation depth scales with partial frequency.651
Jacks 15 — 12 in / 3 out
| Name | Signal | Voltage | Description |
|---|---|---|---|
| Inputs (12) | |||
| BANK LENGTH CV | cv | -5V to 5V | 651 |
| DENSITY CV | cv | -5V to 5V | 651 |
| EXP FM | cv | ≤10V | 651 |
| HARMONIC FACTOR CV | cv | -5V to 5V | 651 |
| LIN FM | audio | — | Through-zero linear FM input; AC coupled (cut below 20Hz); accepts full-bandwidth signals up to 10Vpp.651 |
| PARTIALS CV | cv | -5V to 5V | 651 |
| PEAKING CV | cv | -5V to 5V | 651 |
| PITCH CV | cv | -5V to 10V | V/octave pitch CV input; accepts -5V to +10V; handled by a separate precision A/D converter.651 |
| SPREAD CV | cv | -5V to 5V | 651 |
| TENSION CV | cv | -5V to 5V | 651 |
| TILT CV | cv | -5V to 5V | 651 |
| WARP CV | cv | -5V to 5V | 651 |
| Outputs (3) | |||
| EVEN PARTIALS | audio | ≤20V | Main audio output carrying even-numbered harmonic partials (always mixed with the fundamental).651 |
| FUNDAMENTAL | audio | ≤6V | Fundamental frequency output; outputs either a sinusoid or square wave (selected by back-panel jumper); useful for syncing other oscillators.651 |
| ODD PARTIALS | audio | ≤20V | Main audio output carrying odd-numbered harmonic partials (always mixed with the fundamental).651 |
Parameters 17
| Name | Type | Range | Behavior |
|---|---|---|---|
| Bank Length | knob | — | Defines the length of the repeating pattern of partials distributed between the odd and even outputs. At 0, both outputs carry the full signal. When set to positive values, partials are split into groups distributed across the two outputs. Direction selects which output receives modified frequencies.651 |
| Coarse | knob | — | Sets the fundamental pitch; together with the Fine knob covers the entire audible range (16Hz to 20kHz) without external voltage.651 |
| Density | knob | 0notches – 256notches | Controls the density of the comb notches (0 to 256). At minimum, no notches; at maximum, each second partial is filtered out (at minimum warp). With default settings, sweeping from min to max morphs from sawtooth to square wave.651 |
| Density Attenuator | fader | — | Scales the CV input for Density (slider potentiometer).651 |
| EXP FM Attenuator | menu_setting | — | Controls the depth of exponential FM modulation from the EXP FM input; the slider LED illuminates for both negative and positive voltages to show the absolute degree of modulation.651 |
| Fine | knob | — | Fine pitch adjustment; together with the Coarse knob covers the entire audible range (16Hz to 20kHz) without external voltage.651 |
| Fundamental Out Jumper | jumper | — | Selects the waveform on the FUNDAMENTAL output: either a sinusoid or a square wave.651 |
| Harmonic Factor | knob | — | Frequency-scales partials within one bank by an integer factor: from fractions (1:2, 1:3 down to 1:8) to multiples (2, 3 up to 8). The fundamental (1st partial) is excluded and always present at its original frequency.651 |
| LIN FM Attenuator | fader | — | Controls the depth of the through-zero linear FM modulation (slider).651 |
| Partials | knob | 1partials – 512partials | Limits the spectrum to a specific number of harmonic partials per voice (1 to 512). Response is stepped especially at the beginning of the range; at minimum, only the fundamental is audible. Odessa does not produce partials exceeding 21kHz.651 |
| Peaking | knob | — | Controls the shape of the comb response: at minimum, notches are narrow; at maximum, notches are wide with narrow peaks between them.651 |
| Spread | knob | — | Controls the degree of symmetric detuning of the additional voices around the central voice. Has no effect when only 1 voice is selected. Detuning affects voices 2 and 4 (shifted downwards) and voices 3 and 5 (shifted upwards). Still active when Hel expander is connected.651 |
| Tension | knob | — | Determines harmonicity of the spectrum. At center (dead zone), partials are strict integer multiples of the fundamental. Above center (sharp), partials spread apart (inharmonic metallic timbre). Below center (flat), partials condense (dense rough inharmonic cluster resembling noise). Press Voices button to re-synchronize phases.651 Zones
|
| Tilt | knob | — | Controls how quickly the amplitudes of consecutive partials decrease with frequency. At middle position, partials decrease slowly (like a saw wave). At minimum, decrease is rapid so mostly the fundamental is audible. At maximum, the amplitude spectrum is very flat, resulting in a buzzy, narrow pulse waveform.651 |
| Voices Button | button | — | Selects 1, 3, or 5 stacked unison voices (green/orange/red LED). Also re-synchronizes the phases of all sinusoidal partials within each voice when pressed, restoring waveform coherence after Tension is moved off zero. Press and hold 1 second to engage Leibniz Binary Subsystem control.651 |
| Warp | knob | — | Controls the uniformity of the comb response: at minimum, notches are equidistant in frequency (flanger-like); at maximum, notches are very dense at low frequencies and become more distant for higher overtones (phaser-like).651 |
| Warp Attenuator | fader | — | Scales the CV input for Warp (slider potentiometer).651 |
Firmware history 0 versions
No firmware history recorded.
References 2
- [651]
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[652]
Xaoc Odessa product pageproduct_page⚠ verified 2026-05-21 · manufacturer changed since last verified