AutoFilter extended controls in Final Cut Pro
The extended controls provide enhanced control of AutoFilter functions. To display the extended controls in the Audio inspector, hold the pointer over AutoFilter in the Effects section, then click Show.
Rate Modulation slider and field: Set the LFO frequency, independent of the input signal level. Typically, when the input signal exceeds the threshold, the modulation width of the LFO increases from 0 to the Rate Mod. value. This parameter allows you to override this behavior.
Retrigger button: Start the LFO waveform at 0 each time the threshold is exceeded.
Region Gate On and Off buttons: Turn on to keep the filter open for the entire region length. Turn off to use other AutoFilter parameters to control filter time.
LFO Decay/Delay slider and field: Set the time required for the LFO to move from zero to the maximum value.