When Sync is enabled, the Rate control lets you select a rhythmic subdivision or multiple of the beat for the LFO Rate. Select from the following rhythmic values:
When Sync is disabled, the Rate control lets you change the modulation rate independently of the Pro Tools session tempo.
Enable Sync to synchronize the LFO Rate to the Pro Tools session tempo. When Sync is disabled, you can set the Rate time in Hertz independently of the Pro Tools session tempo. The Sync button is lit when it is enabled.