Syntonie Ondes
Dual video oscillator for geometric luminance pattern creation
8 HP Eurorack module
Ondes is a dual video rate oscillator for Eurorack-based video synthesis, featuring two independent oscillators capable of generating square and triangle/sawtooth waveforms at both horizontal and vertical sync-locked frequencies. Each oscillator includes frequency and amplitude modulation via a four-quadrant multiplier, enabling complex pattern generation from simple geometric shapes to diagonal gradients. The module excels at creating luminance patterns, bars, diamonds, and gradient shapes suitable for analog video processing.
Features
- Two independent video rate oscillators
- Horizontal sync lock mode producing vertical bars (15kHz to 1.5MHz)
- Vertical sync lock mode producing horizontal bars (23.98Hz to 3.5kHz)
- Free-running mode for scrolling horizontal bars (10Hz to 3.5kHz)
- Square wave output per oscillator (0-1V, 75 ohm, ~30ns transition times)
- Triangle/sawtooth wave output per oscillator via four-quadrant multiplier
- Frequency CV input with attenuverter per oscillator (0-1V, 100k ohm)
- Amplitude modulation CV input per oscillator (0-1V, 100k ohm)
- AM normalization switch selectable between +1V and internal square wave routing
- Sawtooth wave generation by self-patching square into AM via normalization switch
- MIX output summing both oscillators linear waveform outputs
- Diamond pattern from MIX with both oscillators in triangle mode
Controls & Jacks (17)
- Oscillator A Frequency — Manual frequency control for Oscillator A, sets the base frequency before CV modulation
- Oscillator B Frequency — Manual frequency control for Oscillator B, sets the base frequency before CV modulation
- Oscillator A Frequency CV Attenuverter — Attenuverter for frequency CV modulation on Oscillator A. Fully clockwise: non-inverted maximum modulation. Fully counter-clockwise: inverte
- Oscillator B Square Output — Square wave output for Oscillator B. 0-1V, 75Ω output impedance. Rapid transitions (~30ns). Not affected by amplitude modulation.
- Oscillator B Amplitude CV Input — CV input for amplitude modulation of Oscillator B (triangle output only). 0-1V, 100kΩ input impedance. 1V: non-inverted max amplitude. 0.5V:
- Oscillator B Frequency CV Input — CV input for frequency modulation of Oscillator B. 0-1V, 100kΩ input impedance.
- Oscillator B Frequency CV Attenuverter — Attenuverter for frequency CV modulation on Oscillator B. Fully clockwise: non-inverted maximum modulation. Fully counter-clockwise: inverte
- Oscillator B Triangle/Sawtooth Output — Linear wave output for Oscillator B. Outputs triangle wave when AM normalization is +1V, sawtooth wave when set to SQR. 0-1V, 75Ω output imp
- Oscillator A Amplitude CV Input — CV input for amplitude modulation of Oscillator A (triangle output only). 0-1V, 100kΩ input impedance. 1V: non-inverted max amplitude. 0.5V:
- Oscillator A Frequency CV Input — CV input for frequency modulation of Oscillator A. 0-1V, 100kΩ input impedance.
- Oscillator B AM Normalization — Amplitude modulation normalization for Oscillator B. +1V: triangle at max amplitude, non-inverted (normal mode). SQR: square wave routed to
- Mix Output — Sum of Oscillator A and Oscillator B linear waveform outputs. Typical use: 2D pattern generation. When both are triangle: diamond shape. One
- Oscillator A Square Output — Square wave output for Oscillator A. 0-1V, 75Ω output impedance. Rapid transitions (~30ns). Not affected by amplitude modulation.
- Oscillator A Triangle/Sawtooth Output — Linear wave output for Oscillator A. Outputs triangle wave when AM normalization is +1V, sawtooth wave when set to SQR. 0-1V, 75Ω output imp
- Oscillator A AM Normalization — Amplitude modulation normalization for Oscillator A. +1V: triangle at max amplitude, non-inverted (normal mode). SQR: square wave routed to
- Oscillator B Sync Mode — Sync selection for Oscillator B. H: horizontal sync, vertical bars, 15kHz-1.5MHz. V: vertical sync, horizontal bars, 23.98Hz-3.5kHz. V (free
- Oscillator A Sync Mode — Sync selection for Oscillator A. H: horizontal sync, vertical bars, 15kHz-1.5MHz. V: vertical sync, horizontal bars, 23.98Hz-3.5kHz. V (free
How-To Guides
- Classic Diamond Shape
- Diagonal Gradient
- Triangle Shape Pattern
- Scrolling Horizontal Bars
- Frequency Modulated Pattern Warping
- Amplitude Keying with External Signal
- Manual Sawtooth via AM Self-Patch
- Inverted Triangle Dark Band Effect
- Dual Free-Running Organic Drift
- Cross-Frequency Modulation
Explore the interactive Ondes panel on BleepDex — tap any control to learn what it does.
