
Ultrabeat oscillator overview in Logic Pro for Mac
Ultrabeat oscillators are used to generate waveforms. Oscillator 2 can use a sample in place of a waveform. The signal of one or both oscillators is then sent to other portions of the synthesizer engine for shaping, processing, or manipulation.
Oscillator 1 can be frequency-modulated by oscillator 2, for FM synthesis sounds.
Oscillator 2 can be ring-modulated with oscillator 1.
Oscillator 2 can use an audio file (a sample), in place of a synthetic waveform. The sample is output as the oscillator 2 signal.
Other sound sources include a separate noise generator and ring modulator that can produce additional signals to those generated by the oscillators. See Ultrabeat ring modulator and Ultrabeat noise generator.
Common oscillator parameters
These parameters are available to both oscillators.

Oscillator on/off button: Click the button (at the top left of oscillator 1 or bottom left of oscillator 2) to turn each oscillator on or off independently.
Volume knob: Set the level of oscillator 1 or 2. Volume can be modulated by the sources found in the mod and pop-up menus.
Pitch slider and field: Drag to set the oscillator pitch in semitone steps. Press Shift to adjust the pitch in cent intervals (1 cent = 1/100 semitone). Pitch can be modulated by the sources found in the mod and via pop-up menus.
Signal Flow button: Click to route the signal of the associated oscillator through the filter or directly to the EQ (in the Output) section. When turned on, the button is highlighted and an arrow indicates the direction of the signal flow.
Mod and via pop-up menus: Determine the modulation sources for oscillator pitch and level. See Ultrabeat modulation overview.
Switch between Ultrabeat oscillator synthesis modes
Oscillator 1 can switch among three synthesis engine types: phase oscillator, fm, and side chain (external audio input). Each mode provides different parameters and features.
Oscillator 2 can switch among three synthesis engine types: phase oscillator, sample, and model. Each mode offers different parameters and features.
In Logic Pro, click a button on the upper edge of oscillator 1 to select a mode (synthesizer engine).
Click a button on the lower edge of oscillator 2 to select a mode (synthesizer engine).