Propellerhead Reason - 4.0 Manual de operaciones descargar pdf (Pagina 339)

THE EFFECT DEVICES

337

The MClass Compressor

This is a single-band compressor capable of everything from subtle compression to

aggressive pumping effects. Like all dynamics processors it is best used as an insert

effect.

The features include “soft-knee” compression for more musical and unobtrusive com-

pression, program-adaptive release time and a sidechain input for de-essing and

other dynamics processing. Additionally, you have a CV output, allowing you to have

the amount of gain reduction control other Reason parameters.

Parameters:

About the Sidechain inputs

D When a signal is connected to the Sidechain inputs, it is this signal that

will trigger the compression.

This signal is not passed to the compressor output, and will thus not be heard (un-

less Sidechain Solo is activated).

D The signal connected to the normal L/R inputs is the signal that will be

processed by the compressor (as usual).

Here follows two examples of how you can use sidechain processing:

Example 1 - using the Sidechain inputs to create ducking effects

“Ducking” is when the level of one signal is reduced by the presence of another sig-

nal. A typical application is to automatically lower the level of a musical bed when a

voice-over starts, and to automatically bring the level up when the voice-over stops. To

set this up, we can name the musical bed in the example “Device A”, and the voice-

over “Device B”. Proceed as follows:

1. Connect Device A and Device B to separate channels on a mixer device.

In this example the signal produced by Device A should be continuous, and the

signal produced by Device B should be intermittent, i.e. it should contain both si-

lent passages and signal passages.

2. Select Device A and then select an MClass compressor from the Create

menu.

The effect will be auto-routed as an insert effect to Device A.

3. Connect a Send on the mixer device to the Sidechain inputs on the MClass

compressor.

As soon as anything is connected to the Sidechain inputs, the “Active” indicator

lights up on the device panel. The compressor will no longer react to the signal

produced by Device A.

4. Turn up the corresponding AUX Send level for Device B on the mixer.

This means that the Device B signal now feeds both the mixer's input, and the

sidechain input on the compressor, which in turn triggers the gain reduction.

Parameter

Description

Input Gain The Input Gain controls the ”drive” of the compression. This deter-

mines how much compression the signal will have in conjunction

with the Threshold. Range: ±12 dB.

Threshold This sets the level at which onset of compression occurs. When the

input level is below the Threshold setting the signal is unaffected.

When the input level exceeds the threshold, compression kicks in.

In practice, this means that the lower the Threshold setting (and the

higher the Input Gain), the more compression will be applied.

Range: -36 dB to 0 dB

Soft Knee Normally signals above the threshold will be compressed immedi-

ately at whatever ratio is set. This can be very noticeable, especially

when using high compression ratios. When Soft Knee is activated,

the onset of compression will be more gradual, producing a less

drastic result.

Ratio This lets you specify the amount of gain reduction applied to the

signals above the set threshold. The Ratio can be set from 1:1 (no

reduction) to ∞:1 (Infinite).

Gain meter This shows the amount of gain reduction (in dB).

Solo Sidechain This allows you to monitor the signal connected to the sidechain in-

put (see below).

Attack This governs how quickly the compressor will apply its effect when

signals rise above the set threshold. If you raise this value, the re-

sponse will be slower, allowing more of the signal to pass through

the compressor unaffected. Typically, this is used for preserving the

attacks of the sounds. Range: 1ms to 100ms.

Release When the signal level drops below the set threshold, this deter-

mines how long it takes before the compressor lets the sound

through unaffected. Set this to short values for intense, “pumping”

compressor effects, or to longer values for a smoother change of

the dynamics. Range: 50ms to 600ms.

Adapt

Release

When this is used, set Release to the time you want for short peaks

- when longer peaks occur, the Release time is automatically in-

creased.

Output Gain This controls the output gain and can be used to compensate for

the gain reduction caused by compression. Range: ±12 dB.

Parameter

Description

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