Owner's manual

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

DE-ESS TYPES

DISPLAY BOTTOM

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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

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.