Harmonic Exciters

A harmonic exciter (or 'enhancer') is often applied to a track during the mastering process to help add that final piece of 'sparkle' to a mix. By applying this type of processing, the unabridged resolution of the music can be artificially increased, resulting in a sonically brighter final product.

The original function of a harmonic exciter is to restore or replace any frequencies that may have been compromised or left out altogether during the mixing stage. This can often be attributed to other processing which has been applied to the assorted tracks, consequently dulling many of the transients due to assorted changes in phase. One way an enhancer can settle this issue is to realign the phase of the transients, which helps to restore their definition and therefore increases the normal clarity of the music.

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Another way that exciters can improve the brightness of sound is to introduce reasonably small amounts of harmonic distortion. Singular frequencies can be targeted by adjusting the controls, and the exciter will treat the sound by subjecting it to second and third order harmonic distortion. This distortion is then mixed back in with the original signal, resulting in a much cleaner and brighter sound.

Many modern harmonic exciter plugins are multi band, which allows the user to apply dissimilar amounts of enhancement to dissimilar frequencies bands. As the aim of an exciter is to artificially growth the brightness of the high frequencies, and the density of the medium to low frequencies, it is prominent that these can be treated separately. Multi band variants are therefore very flexible in these situations.

It is prominent to use enhancers diligently, especially if applied across the whole mastering bus. Overuse of this type of processing can often corollary in a fatiguing and overtly unnatural sound which is unpleasant to the listener.

Harmonic Exciters

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