Klark Teknik U.S.A. Stereo Receiver DN530 Manual Do Utilizador

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We all have the ability to block out constant background noises and often using a gate 
to eliminate background noises altogether defeats this mechanism.  This tends to draw 
our attention to the noise when the gate opens.  Typically, adjusting the gate range 
down to 10dB or 15dB produces results that sound much more natural.

Ducking is used to automatically reduce the signal levels when the level of a source 
signal (from the external sidechain) goes over threshold.  This is typically used in 
situations requiring a voice-over.  For example, when an announcer or DJ wants to 
speak, the background music is automatically made to duck (is attenuated) so that 
their voice can be heard clearly and at a normal level.

Compressors have traditionally been used for de-essing, but the degree of de-essing 
achieved is very level dependent, that is, the loud passages will have sibilance ("s" 
sounds) attenuated more than the quiet ones.

De-essing using the duck mode of the DN530 is an alternative way of removing 
sibilance, rather than using compression.  Use the solo to tune the sidechain filter into 
the sibilance (around 10kHz).  Set the attack relatively fast (1ms), and similarly with 
the release (30ms), plus a little hold and then trim the threshold so that the gate meter 
respond to all the sibilant sounds but not to normal speech.  Attenuation ranges that 
are between 6dB to 10dB will produce the best results, consistently reducing sibilance 
to the same  degree.