Overdrive emulates the distortion produced by a field effect transistor (FET), commonly used in solid-state musical instrument amplifiers and hardware effects devices. When saturated, FETs generate a warmer-sounding distortion than bipolar transistors, such as those emulated by the Distortion effect.

Overdrive parameters
Drive slider and field: Set the saturation amount for the simulated transistor.
Display: Shows the impact of parameters on the signal.
Tone knob and field: Set the frequency of the high cut filter. Filtering the harmonically rich distorted signal produces a softer tone.
Output slider and field: Set the output level. This allows you to compensate for increases in loudness caused by using Overdrive.