Exciter
Definition
A processor that generates and adds harmonic content — typically upper harmonics — to an audio signal to increase perceived brightness and presence without simply boosting high frequencies with an EQ.
In Simple Terms
Adds sparkle and presence to a sound by generating subtle brightness that an EQ boost can't quite achieve. Good for making a dull recording feel more alive without turning it harsh.
In Practice
A subtle exciter on an acoustic guitar adds air and sparkle to the upper frequencies, helping it cut through a dense mix without sounding harsh.