Klark Teknik DN500 manual Applications De-essing

Applications:De-essing￿￿￿￿

De-essing is an important compression technique using the Side Chain. Many singers have high level sibilants 'sss' sounds which detract from their performance. Equalising the signal will reduce the sibilants, but also make the overall vocal sound dull.

The sibilants can be selectively removed by compressing only when there is an excessive level of high frequencies. Here is one way to do it :

Mic Input			Aux Send
	Insert Send	Line In
(Channel routed			Send
	(channel 1)	(channel 2)
to group)
			Return

Output

Diagram 10

	Compressor side
Input	chain input

The microphone channel is routed to a group with the Compressor patched into the group insert points. The microphone channel is also parallelled into another channel via the line input. The signal in the second channel is equalised so that high frequencies in the sibilant range are boosted. This channel is fed via an auxiliary output to the Compressor Side Chain input.

Now, the Compressor will react whenever there is a sibilant, reducing the gain for the duration of the sibilant and cleaning up the vocal sound.

This technique can also be used to compensate for a 'boomy' bass, or other situations where a band of frequencies is occasionally obtrusive.

The DN500 Plus Dual Compressor/Limiter/Expander offers a unique combination of dynamic gain control processors. Engineers will find it a powerful tool in recording, broadcast and post-production studios, and in sound reinforcement systems.

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