LFOs

Twin offers three LFOs (Low Frequency Oscillators). An LFO generates a low-frequency wave which can be used as a modulation source. It offers the following settings:

• Wave form
  The wave form switch selects a triangle, square, sine, random triangle or sample-and-hold wave.
• Balance
  The balance knob adjusts the balance between rising and falling ramps in the wave form. To reset the wave form, hold down the Ctrl key (Windows) or Command key (Mac) and click the knob once.
• Sync mode
  The Sync switch chooses between arbitrary frequency settings and synchronizing with the tempo and song position of the plug-in host. You can either synchronize in straight mode, dotted mode (resulting in a frequency that is one and a half times that of straight synchronization) or triplets mode (resulting in two/thirds of the straight frequency).
• Frequency
  Sets the speed of the wave form that is produced by the LFO. When synchronized to the host's tempo and position (with the sync switch at one of the note symbols), you can choose a 'frequency' in bars, between 16 bars and 1/64 bar. Otherwise, you can set an arbitrary frequency. The LFO frequency setting is a modulation target.
• MIDI triggering
  When the MIDI toggle button is enabled, the LFO can be triggered by MIDI note-on messages. When triggered, the LFO will start a new phase. If MIDI triggering is combined with frequency synchronization, the LFO will still synchronize the frequency and song position with the host, but the relative position is changed when triggered.
• Polarity
  By default, the LFO generates bi-polar wave forms between -1 and 1. This means that when you use an LFO to modulate, for example, the filter cut-off frequency, the LFO will move that frequency to either side of the selected cut-off value. When the mono-polar toggle button (directly under the MIDI triggering button) is enabled, the LFO will generate positive-only signals between 0 and 1.

Notes

• The LFOs are global modulation sources, which means that the same signal is used for all voices that are played. When modulating a global setting like the LFO frequency with a per-voice modulation signal such as an envelope generator, the highest signal value of all active voice envelopes is used.
• When you want to modulate a plugin parameter with an LFO, use the drag-and-drop connection method: for each LFO, there is a modulation source icon which can be dragged directly to any knob that can be modulated to fill a modulation slot!
• The settings of an LFO can be stored as a section preset.

Next: Envelope generators

See Also
Overview