The Roland FD8 Hi-Hat Pedal is a digital hi-hat controller designed to be used with electronic drum kits. It is a dual-trigger pedal that allows for a wide range of hi-hat sounds and effects. It has been used by many professional drummers, including Dave Grohl, Chad Smith, and Travis Barker.
The FD8 works by sensing the pressure applied to the pedal and sending a signal to the drum module. This signal is then used to trigger the appropriate hi-hat sound. The pedal has a range of features, including adjustable sensitivity, a variable open/closed sound, and a footswitch for controlling the hi-hat sound. It also has a built-in metronome and a mute function for silent practice.