Oscillators
OB-Xf contains two independent oscillators, each with its own waveform, pitch, and modulation options.
Tuning
Section titled “Tuning”- Osc 1: Controls the coarse tuning of Oscillator 1, from -24.00 to 24.00 semitones.
- Detune: Controls the fine tuning of Oscillator 2 only, from 0.1 to 100 cents. Like on any analog synth, the two oscillators will never be perfectly in tune with each other, which is why this control won’t go down to 0 cents.
- Osc 2: Controls the coarse tuning of Oscillator 2, from -24.00 to 24.00 semitones.
Waveform
Section titled “Waveform”Two buttons govern the waveform selection for each oscillator. Available options are Sawtooth and Pulse. If neither of these buttons are enabled, the oscillator outputs a Triangle wave, and the triangle wave icon between the two buttons is highlighted.
Pulse Width
Section titled “Pulse Width”- PW: Controls the pulse width of Pulse waveform for both oscillators. It is applicable if either oscillator is set to a pulse wave. It ranges from 50% to 97.5%.
- OSC 2 Offset: Additionally offsets the pulse width of Oscillator 2 relative to Oscillator 1. It ranges from 50% to 97.5%.
Crossmod and Sync
Section titled “Crossmod and Sync”- Crossmod: Adjusts the amount of frequency modulation of Oscillator 2 by the output of Oscillator 1.
- Sync: Enables hard synchronization of Oscillator 2 to Oscillator 1. Effectively, the waveform of Oscillator 2 is restarted every time Oscillator 1 is itself restarted (waveform begins a new cycle), creating a more complex waveform.
Bright
Section titled “Bright”This control adjusts the emphasis of high-frequency harmonics in the output of both oscillators. This can add presence and clarity to the sound.
Filter Envelope Modulations
Section titled “Filter Envelope Modulations”- Env to Pitch: Adjust the amount of modulation applied from the Filter Envelope to the pitch of Oscillator 2 only (if OSC 1+2 is disabled). It ranges from 0.00 to 36.00 semitones.
- Env to PW: Adjust the amount of modulation applied from the Filter Envelope to the pulse width of Oscillator 2 only (if OSC 1+2 is disabled).
Inv(ert) and Osc 1+2
Section titled “Inv(ert) and Osc 1+2”These parameters are available for both Env to Pitch and Env to PW modulations.
- Inv: Inverts the polarity of the Env to Pitch and Env to PW modulations.
- Osc 1+2: When enabled, the modulation is applied to both oscillators equallty. When disabled, modulation is applied to Oscillator 2 only.