Drawmer M500 Dynamics Processor - Manual (Page 28)

M500 OPERATORS MANUAL Ch 5 - 1
CHAPTER 5
ADVANCED EFFECT OPERATION
The Effect modules described fully in this chapter are listed as they appear on the M500 front
panel, working left-to-right. The format for each effect is similar describing each parameter's
function and capabilities. The descriptions end with a list of suitable factory patches, which can
be loaded and tried with the suggested material or programme.
ADVANCED DE-ESS
De-essing is essentially frequency conscious compression and is generally used to attenuate the
sibilant components of speech to an acceptable level. In operation, the side chain filters are used
to tune to the undesirable aspect of the sound, usually sibilants and this signal is then used to
control the 'Compressor' section so that more gain reduction is applied at this frequency.
Four different types of DE-ESSER are offered within the M500. Only the most basic, single-band
DE-ESSER can be used as a single channel Effect, other types of DE-ESSER require the electronic
circuitry of both audio channels, effectively making the M500 unit a mono device.
Changing from one type of DE-ESSER to another is prohibited when a DE-ESSER is already
assigned to either channel. This is because the other channel may already be using a simple DE-
ESSER or COMPRESSOR, and the changes to the internal routeing of the M500 are very drastic.
Selecting the bottom screen page permits a DE-ESS TYPE change. There are four configurations
of the De-Esser.
DOWN
DOWN
DE-ESS TYPES
DISPLAY BOTTOM
PAGE
Full band De-Ess Full band De-Ess
The standard, Full band De-Esser which uses a filtered side chain signal
to control the dynamics of the whole audio spectrum. This is the most
commonly used type of De-Esser and suffers the limitation that non-
sibilant, low frequency sounds will also be attenuated if they occur at the
same time as sibilant ones. With this TYPE of DE-ESSER, the THRESHOLD
'sees' the audio signal after it has passed through the FILTER.
1<-- Single band De-Ess 1<-- Single band De-Ess
A more sophisticated De-Esser where the audio input is split into two
bands and only the dynamics of the upper band are controlled. This mode
prevents the unwanted attenuation of low frequency sounds. Because of
the increased complexity, this mode is available only on channel 1. The
filter setting determines both the side chain response and the band to be
ducked. The audio filter of channel 2 is 'Anti-phased' to split the audio
input into two frequency bands.