Metric Halo De-Esser Manuel utilisateur

De-Esser

User’s Guide

Precision DeEsser Users Guide

Metric Halo

$Revision: 1624 $

Publication date $Date: 2011-12-13 16:36:00 -0400 (Tue, 13 Dec 2011) $

Table of Contents

1. Introduction ................................................................................................................................. 5

Congratulations ........................................................................................................................ 5

What is the Precision DeEsser? .................................................................................................. 5

2. Operating .................................................................................................................................... 6

Control Knob ........................................................................................................................... 6

Listen control ........................................................................................................................... 6

Tooltip control ......................................................................................................................... 7

DeEsser detector level meter ..................................................................................................... 7

Gain reduction meter ................................................................................................................ 7

Ess Band Transfer Function ........................................................................................................ 8

Spectragraph Analyzer .............................................................................................................. 8

3. Processing .................................................................................................................................. 10

A Detailed Description ............................................................................................................ 10

Ess Band Filter ........................................................................................................................ 10

Compressor ............................................................................................................................ 10

Threshold Control ........................................................................................................... 11

Ratio Control .................................................................................................................. 11

Attack Control ................................................................................................................ 11

Release Control .............................................................................................................. 11

4. Working with Hosts .................................................................................................................... 12

Pro Tools™ ............................................................................................................................ 12

Plug-in Window ............................................................................................................. 12

KEY COMMANDS .......................................................................................................... 13

5. Conclusion ................................................................................................................................. 14

6. Service and Support .................................................................................................................... 15

List of Figures

1.1. Precision DeEsser's User Interface .............................................................................................. 5

2.1. Swept Knob ............................................................................................................................. 6

2.2. Spread Knob ............................................................................................................................ 6

2.3. Listen Control .......................................................................................................................... 6

2.4. Tooltip Control ......................................................................................................................... 7

2.5. DeEsser detector level meter ..................................................................................................... 7

2.6. Gain Reduction Meter .............................................................................................................. 7

2.7. Ess Band Transfer Function ........................................................................................................ 8

2.8. Spectragraph Display ................................................................................................................ 8

3.1. Signal Flow ............................................................................................................................ 10

3.2. Ess Band Filter controls ........................................................................................................... 10

3.3. Compressor controls ............................................................................................................... 11

4.1. Pro Tools Plug-in Window ...................................................................................................... 12

4.2. Compare Button ..................................................................................................................... 12

4.3. Automation Window ............................................................................................................... 13

1. Introduction

Congratulations

Thank you for purchasing the Precision DeEsser. You have just transformed your Digital Audio Workstation

into a world class vocal processor.

What is the Precision DeEsser?

The Precision DeEsser is a plug-in for digital audio workstations which provides a processor to tame excessive

sibilance in vocal tracks.

Features include:

•Advanced process metering

•Scalable gain reduction meter

•Precision filter

•Flexible dynamics processor

•SpectraFoo spectragraph analysis

Figure 1.1: Precision DeEsser's User Interface

2. Operating

The Precision DeEsser user interface uses a few different control elements to control all of the processing.

These elements are:

Control Knob

Control Knobs are used to control the value of various continuous parameters of a process. Examples of these

types of parameters include: Attack time, Release Time, Threshold, etc. There are two styles of encoders:

Figure 2.1: Swept Knob

The rings around these encoders sweep from a minimum to maximum value, from left to right. One exception

is the threshold control, which sweeps from right to left.

Figure 2.2: Spread Knob

The ring around this encoder starts at 12 o'clock and spreads to both sides equally as the control is increased.

This knob is used for the bandwidth control.

You can change the value of each knob in a number of different ways. Click and drag the knob to change the

value continuously. Dragging up or to the right will increase the value, while dragging down or to the left will

decrease the value. If you hold down the ⌘ (Command) key when you click, you will be able to adjust the

value with finer precision. If you hold the ⌥ (Option) key when you click, the knob will reset to its default

value. You may also double-click a knob to reset it.

Click on the number (readout) of the knob to pop up a text entry field that allows you to type in a number

directly. The popup will remain active until you dismiss it by clicking somewhere else or hitting the return,

enter, tab, or ⌘. (Command + .) or ESC keys. Hit return or enter to confirm the value and dismiss the

popup. Hit the tab key to confirm the value and pop up an entry field for the next control. ⇧-tab (Shift +

tab) will pop up the entry field for the previous control). Hit ⌘. (Command + .) or ESC (Escape) to dismiss

the popup and cancel the change.

When you enter a number into the pop up entry, you can use a couple of abbreviations: “k” multiplies the

number by 1000 and “m” divides the number by 1000. So if you want to enter 16,500 Hz you can just type

16.5k.

Listen control

Figure 2.3: Listen Control

Operating

This button selects what part of the audio signal you are monitoring:

•DeEssed Signal: The final output of the plug-in after processing

•Esses: The output of the compressor, without the non-processed audio

•Detector Signal: This is the post-filter, pre-compressor audio

•Out-of-Band Signal: The Detector signal subtracted from the input; this allows you to hear audio that

is not being processed

•Removed Material: The Esses signal subtracted from the Detector signal; this allows you to hear only

the audio that is being removed

Tooltip control

Figure 2.4: Tooltip Control

This button toggles the tooltip display. When enabled, tooltips wil be shown when the mouse hovers over a

control. When the tooltip display is disabled, you may still see tooltips by holding down the ? key and hovering

over a control.

DeEsser detector level meter

Figure 2.5: DeEsser detector level meter

The Precision DeEsser provides a meter displaying the level of the detector (derived from the from the Ess-

band) when the De-Esser is active. The processor threshold is indicated by the red threshold slider above the

detector meter. This red bar can be manipulated directly with the mouse. While this meter should never clip

(the signal would have to be exceedingly high), the top segment of the meter (above 0dB) is used as a clip

indicator and is illuminated red if the input section of the processor detects an over. The clip light remains

illuminated until you click on the meter. ⌥ (Option)–click the meter to reset the clip light.

Gain reduction meter

Figure 2.6: Gain Reduction Meter

The gain reduction meter, which has an orange bar and grows down from 0 dB, shows the amount of attenu-

ation being applied by the dynamics processor at any given time. If you right-click or ⌃ (Control) click on the

meter, you may set the scale of the gain reduction meter to any of the following values:

• 54 dB

• 24 db

• 12 db

• 6 db

• 3 db

Operating

Ess Band Transfer Function

Figure 2.7: Ess Band Transfer Function

The ess band transfer function is a combination of a visual representation of how the de-esser is processing

the signal and an intuitive controller for the associated filter. This display is sometimes called a “Cartesian

Graph” by other manufacturers.

The horizontal axis provides frequency calibration in Hertz (Hz). The vertical axis provides level calibration

in decibels (dBr). The heavy green line indicates the shape of the filter. The center frequency is represented by

a large dot in the transfer function with two smaller dots flanking it.

Clicking on the large dot and dragging will allow you to adjust the center frequency. ⌥ (Option)–click and

drag the dot to adjust the bandwidth (dragging right increases the bandwidth, left decreases the bandwidth).

Click and drag the smaller dots associated with a larger dot to adjust the filter bandwidth.

To dismiss the filter curve, click anywhere in the black area of the transfer function. This will deselect the filter

point, and the only trace displayed will be the green master curve.

Spectragraph Analyzer

Clicking the SpectraFoo logo in the upper right hand corner of the transfer function will activate the spectra-

graph, showing the realtime frequency analysis of your signal:

Figure 2.8: Spectragraph Display

Operating

The traces are:

• White: Instantaneous display

• Yellow: Average display

The instantaneous trace updates in real-time, allowing you to see the immediate peak level of your audio. The

average trace displays the level as averaged over a short period, giving you a more general view.

The spectragraph analyses the signal currently being audition, as set by the “Listen To:” button. To disable the

spectragraph entirely, click the active 'Foo icon.

If you right-click or ⌃ (Control) click on the transfer function, you will see a menu to set options for the

spectragraph:

• Show Instantaneous Trace: Toggles whether the spectragraph shows the instant response of your audio.

• Show Average Trace: Toggles whether the spectragraph shows the averaged response of your audio.

These settings are stored for each instance of the Precision DeEsser.

3. Processing

A Detailed Description

In this chapter we'll discuss how the controls work.

Input

Listen To:

Output

SpectraFoo

CompressorFilter

DeEssed Signal

Esses

Detector

Removed Material

Out-of-Band Signal

Figure 3.1: Signal Flow

The block diagram above illustrates the overall structure of the processing system provided by the Precision

DeEsser. The diagram does not indicate the metering blocks.

Now lets examine the various processing blocks indicated in the diagram.

Ess Band Filter

When the signal is routed to the Precision DeEsser it runs through a filter block that allows you to define the

frequency area to be processed.

Figure 3.2: Ess Band Filter controls

The filter controls are:

•Center: Sets the center frequency of the ess band filter.

•BW (Oct): Sets the bandwidth of the ess band filter. Higher values widen the filter.

•Sharpness: Sets the slope of the filter

To use the filter, set the Center parameter as close as possible to the undesired frequency. Use the BandWidth

control to set the overall width of the filter; a narrow bandwidth will let less audio through to the compressor,

while large bandwidths will process more overall. By using the Sharpness control you may shape the slope of

the filter, to adjust the transition between the processed and non-processed audio.

Compressor

The next processing block is the compressor. The compressor is used to reduce the level of the audio within

the filter boundary once it exceeds the threshold.

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