Avid Pro Expander Guide - Avid...

Avid Pro Expander Guide

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Product features, specifications, system requirements, and availability are subject to change without notice.

Guide Part Number 9329-65266-00 REV A 01/13

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Chapter 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1System Requirements and Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Registering Plug-Ins. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Working with Plug-Ins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Conventions Used in This Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2About www.avid.com . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Chapter 2. Installation and Authorization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Installing Plug-Ins for Pro Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Authorizing Plug-Ins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Removing Plug-Ins. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Chapter 3. Pro Expander . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Metering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Dynamics Graph . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Pro Expander Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Side-Chain Processing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Contents

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Avid Pro Expander Plug-In Guide

Chapter 1: Introduction

Avid Pro Expander is an AAX format plug-in (DSP, Native, and AudioSuite) that provides dynamics processing based on the award winning Euphonix System 5 console channel strip effects.

Pro Expander supports 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, and 192 kHz sam-ple rates. Pro Expander also supports mono, ste-reo, and greater-than-stereo multichannel formats up to 7.1.

This guide provides information on installing and using the Avid Pro Expander plug-in for Pro Tools sessions.

For general information on using plug-ins with Pro Tools, see the Pro Tools Reference Guide.

Greater-than-stereo formats are only avail-able with Pro Tools HD and Pro Tools with Complete Production Toolkit.

System Requirements and CompatibilityTo use Avid Pro Expander you need the following:

• An iLok USB Smart Key

• An iLok.com account for managing iLok licenses

• A qualified Pro Tools system (version 10.3.3 or higher)

Avid can only assure compatibility and provide support for hardware and software it has tested and approved.

For complete system requirements and a list of qualified computers, operating systems, hard drives, and third-party devices, visit:

www.avid.com/compatibility

Chapter 1: Introduction 1

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Registering Plug-InsYour plug-in purchase is automatically registered when you activate your iLok license (see “Autho-rizing Plug-Ins” on page 5).

Registered users are eligible to receive software update and upgrade notices.

For information on technical support, visit www.avid.com.

Working with Plug-InsBesides the information provided in this guide, refer to the Pro Tools Reference Guide for general information on working with plug-ins, including:

• Inserting plug-ins on tracks

• Using clip indicators

• Navigating the Plug-In window

• Adjusting plug-in controls

• Automating plug-ins

• Using plug-in presets


Conventions Used in This GuidePro Tools guides use the following conventions to indicate menu choices and key commands::

The names of Commands, Options, and Settings that appear on-screen are in a different font.

The following symbols are used to highlight important information:

Convention Action

File > Save Choose Save from the File menu

Control+N Hold down the Control key and press the N key

Control-click Hold down the Control key and click the mouse button

Right-click Click with the right mouse button

User Tips are helpful hints for getting the most from your Pro Tools system.

Important Notices include information that could affect your Pro Tools session data or the performance of your Pro Tools system.

Shortcuts show you useful keyboard or mouse shortcuts.

Cross References point to related sections in this guide and other Pro Tools guides.

About www.avid.comThe Avid website (www.avid.com) is your best online source for information to help you get the most out of your Pro Tools system. The following are just a few of the services and features available.

Product Registration Register your purchase online.

Support and Downloads Contact Avid Customer Success (technical support); download software updates and the latest online manuals; browse the Compatibility documents for system requirements; search the online Knowledge Base or join the worldwide Pro Tools community on the User Con-ference.

Training and Education Study on your own using courses available online or find out how you can learn in a classroom setting at a certified Pro Tools training center.

Products and Developers Learn about Avid products; download demo software or learn about our Development Partners and their plug-ins, applications, and hardware.

News and Events Get the latest news from Avid or sign up for a Pro Tools demo.

Chapter 1: Introduction 3

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Chapter 2: Installation and Authorization

Installing Plug-Ins for Pro ToolsThe installer for your plug-in can be downloaded from the Avid Store (shop.avid.com) or through your my.avid.com account. Plug-Ins can also be purchased retail, in which case the included activa-tion card provides the necessary information for downloading, installing, and authorizing your plug-in (www.avid.com/activation).

To install a plug-in:

1 Download the installer for your computer plat-form from www.avid.com. After downloading, make sure the installer is uncompressed (.dmg on Mac or .ZIP on Windows).

2 If Pro Tools is running, quit Pro Tools.

3 Locate and double-click the plug-in installer application.

4 Follow the on-screen instructions to complete the installation.

5 When installation is complete, click Quit (Mac) or Finish (Windows).

When you launch Pro Tools, you are prompted to authorize your new plug-in.

For more information about Avid audio plug-ins, visit www.avid.com/plugins.

Authorizing Plug-InsAvid Pro Tools plug-ins are authorized using the iLok USB Smart Key (iLok), manufactured by PACE Anti-Piracy.

An iLok can hold hundreds of licenses for all of your iLok-enabled software. Once a license for a given piece of software is placed on an iLok, you can use the iLok to authorize that software on any computer.

Once you have purchased your software from the Avid Store or entered your activation code online, an authorization license for your software is posted to your iLok account. Authorize your software by downloading the license from iLok account to your iLok USB Smart Key.

iLok USB Smart Key

An iLok USB Smart Key is not supplied with plug-ins or software options. You can use the iLok included with certain Pro Tools systems or purchase one separately.

For more information, visit the iLok website (www.iLok.com).

Chapter 2: Installation and Authorization 5

6

To download the license for your software to your iLok:

1 If you don’t already have an iLok account, visit www.ilok.com to sign up for one.

2 Log in to your iLok.com account at www.ilok.com.

3 Follow the online instructions to transfer the license from your iLok account to your iLok USB Smart Key.


Removing Plug-InsIf you need to remove a plug-in from your Pro Tools system, follow the instructions below for your computer platform.

Mac OS X

To remove a plug-in:

1 Locate and open the Plug-Ins folder on your Startup drive (Library/Application Support/Avid/Audio/Plug-Ins).

2 Do one of the following:

• Drag the plug-in to the Trash and empty the Trash.

• Drag the plug-in to the Plug-Ins (Unused) folder.

Windows

To remove a plug-in:

1 Choose Start > Control Panel.

2 Click Programs and Features.

3 Select the plug-in from the list of installed ap-plications.

4 Click Uninstall.

5 Follow the on-screen instructions to remove the plug-in.

Chapter 3: Pro Expander

Avid Pro Expander is an AAX plug-in (DSP, Native, and AudioSuite) that provides dynamic expansion and gating processing for Pro Tools sys-tems. The Avid Pro Expander processing algo-rithms are based on the award-winning Euphonix System 5 console channel strip effects.

In addition to standard knob and fader controls, Pro Expander also provides a dynamics graph to track the gain transfer curve for dynamic expan-sion and gating, as well as a frequency graph for side-chain filtering. Additionally, the dynamics graph can be used to graphically edit the Thresh-old, Ratio, Knee, and Depth settings.

Pro Expander plug-in

MeteringPro Expander provides combined meters that show both sample peak metering and averaged metering. Pro Expander uses sample peak meters over aver-age metering for Input and Output signals. Attenu-ation metering uses sample peak metering only.

The Peak Hold value is displayed numerically at the top of the meter and the Peak Hold indicator appears as a thin orange line in the meter. This pro-vides highly accurate visual metering correlation with the audio signal. Pro Expander also displays averaging metering with an integration time of ap-proximately 400 ms.

Input and Output meters use the following color coding:

Dark Blue Indicates nominal levels from –90 dB to –20 dB.

Light Blue Indicates pre-clipping levels, from –20 dB to 0 dB.

Yellow Indicates full scale levels from 0 dB to +6 dB.

Attenuation meters show dark blue for the entire dynamic range displayed.

Chapter 3: Pro Expander 7

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Peak IndicatorsThe Input and Output meters provide graphical representation of transient peaks, as well as graph-ical and numerical display of the last, greatest reg-istered peak. The Attenuation meter provides sim-ilar graphical and numeric representations for the amount of compression.

The numerical display for the Peak value turns orange when the signal exceeds 0 dB on the me-ters. You can click the numerical display to reset the displayed value.

Peak indicators in the Output meters

Peak Hold value

Peak Hold indicator

Sample Peak indicator

Average meter


InputThe Input section provides input metering and con-trols for adjusting the level of the input signal.

Input LevelThe Input Level control sets the input gain of the plug-in before processing, letting you boost or at-tenuate gain at the plug-in input stage.

To adjust the level of the input signal, do one of the following:

Click in the Input Level field to type the desired value (–36.0 dB to +36.0 dB).

Click the Input Level control and drag up or down to adjust the Input Level setting.

Input MetersThe Input meters show peak signal levels before processing.

Input section with Meters and Input Level control

OutputThe Output section provides output metering and controls for adjusting the level of the output signal. The Output meters can also be toggled to show post-processing gain attenuation meters.

Output section with Meters and Output Level control

Output LevelThe Output Level control sets the output level after processing, letting you boost or attenuate gain on the channel where the Pro Expander plug-in is being used.

To adjust the output level, do one of the following:

Click in the Output Level field to type a value (–INF dB to +12 dB).

Click the Output Volume control and drag up or down to adjust the Output Volume setting.

Output MetersThe Output meters show peak signal levels after processing.

Attenuation MetersThe Output meter can be switched to show Atten-uation metering for the processed signal from 0 dB to –36 dB.

To toggle between the Attenuation and Output meters:

Click the Output/Attenuation toggle in the top right-hand corner of the Output section.

Output/Attenuation toggle, Attenuation meters shown


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Dynamics GraphThe Dynamics Graph display shows a curve that represents the level of the input signal (on the hor-izontal x–axis) and the amount of processing ap-plied (on the vertical y–axis). The display shows a vertical line representing the Threshold setting for the Expander.

The Dynamics Graph display also features an ani-mated red ball in the gain transfer curve display. This ball shows the amount of input gain (x-axis) and gain reduction (y-axis) being applied to the in-coming signal at any given moment. To indicate overshoots (when an incoming signal peak is too fast for the current compression setting), the ball temporarily leaves the gain transfer curve.

Use this graph as a visual guideline to see how much dynamics processing you are applying to the incoming audio signal.

Dynamics graph display

Input signal level (x-axis)

Threshold

Amount of processing (y-axis)


Using the Dynamics Graph to Adjust ControlsYou can drag in the Dynamics Graph display to adjust the corresponding Expander controls. The cursor updates to show which control is being adjusted:

• Threshold

• Ratio

• Knee

• Depth

To adjust the Threshold setting using the Dynamics graph:

Position the cursor over the vertical Threshold line in the graph and drag left or right to make the adjustment.

To adjust the Ratio setting using the Dynamics graph:

Position the cursor over the ratio curve in the graph and drag up or down (or left or right) to make the adjustment.

Cursor indicates Threshold adjustment

Cursor indicates Ratio adjustment

To adjust the Knee setting using the Dynamics graph:

Position the cursor over the “knee” of the curve in the graph and drag up or down (or left or right) to make the adjustment.

To adjust the Depth setting using the Dynamics graph:

Position the cursor over the horizontal Depth line in the graph and drag up or down (or left or right) to make the adjustment.

Cursor indicates Knee adjustment

Cursor indicates Depth adjustment

Detection ModesPro Expander provides several different detection options for determining how the expander re-sponds to the input signal.

To change the detection mode for the expander:

Click the desired detection mode from the op-tions available above the Dynamics graph.

Detection options include the following:

Smart Select the Smart option for tracks with di-verse input signals, or if you are simply not sure what detector works best with the given audio ma-terial. The Smart option analyzes the incoming sig-nal and switches between the different detection modes as needed.

RMS Select the RMS option to apply processing according to the detected RMS (Root Mean Square) amplitude of the input signal. The RMS option is similar to the Average option, but with a faster release time.

Average Select the Average option to apply pro-cessing according to the detected average ampli-tude of the input signal.

Peak Select the Peak option to apply processing according to the detected peak amplitude of the input signal.

Fast Select the Fast option for tracks with high and short transient signals, such as a snare drum track. The Fast option is similar to the Peak option, but with faster attack and release times. However, be careful when using the Fast option as it distorts earlier than the other options. Be sure to configure the other compressor settings with this in mind.

Detection mode options, Smart mode selected


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Duck Select the Duck option to use Pro Expander as a ducker. In order to use Pro Limiter as a ducker, set up an external key input side-chain bussed from another track. When the Duck option is enabled, the incoming signal is attenuated when the side-chain input crosses the Threshold setting. For the most predictable results, set Ratio to GATE. Use the Depth control to adjust the amount of ducking applied to the input signal. Dialog or voice-over is most commonly used as an external key input to duck (attenuate) the program material (typically music) on the track where Pro Expander is in-serted.

As a general rule, when ducking program ma-terial with dialog or voice-over, set the Attack and Release controls in a range of 300 to 500 milliseconds.

When Duck is enabled, the Upward option is automatically disabled.


Attenuation Listen ModeAttenuation Listen mode lets you isolate the pro-cessed part of the audio signal. This can help you hear what parts of the input signal are triggering expansion or gating, which, in turn, can help you better understand the characteristics of the current settings of the expander/gate.

To enable (or disable) Attenuation Listen mode:

Click the Attenuation Listen button (the speaker icon at the top right of the dynamics graph) so that it is highlighted. The button flashes while Attenuation Listen mode is enabled. To disable it, click the button again so that it is not high-lighted.

Attenuation Listen mode enabled

Pro Expander Controls

ThresholdThe Threshold control sets the level below which an input signal must fall to trigger expansion or gating. Signals that fall below the threshold will be reduced in gain. Signals that are above it will be unaffected.

The Dynamics Graph display shows the threshold as a vertical line.

RatioThe Ratio control sets the amount of expansion. For example, if this is set to 2:1, it will lower sig-nals below the threshold by one half. At higher ra-tio levels, Pro Expander functions like a gate by cutting off signals that fall below the threshold. As you adjust the ratio control, refer to the Dynamics Graph display to see how the shape of the expan-sion curve changes.

UpwardThe Upward button enables Upward Expansion mode. When Upward Expansion mode is enabled, Pro Expander amplifies signals above the Thresh-old. When it is disabled, the signal is attenuated when the signal falls below threshold.

To enable (or disable) Upward Expansion mode:

Click the Upward button so that it is high-lighted. To disable it, click the button again so that it is not highlighted.

KneeThe Knee control sets the rate at which the proces-sor reaches full expansion or gating effect once the threshold has been exceeded.

AttackThe Attack control sets the attack time, or the rate at which gain is reduced after the input signal crosses the threshold. Use this along with the Ratio setting to control how soft Pro Expander’s gain reduction curve is.

ReleaseThe Release control sets how long it takes for the expansion to close or the gate to open after the in-put signal falls below the Threshold level and the Hold time has passed.

DepthThe Depth control sets the depth of the processing (expansion or gating) when closed. Setting the pro-cessing to higher Depth levels allows more audio that falls below the threshold to remain audible.

HoldThe Hold control specifies the duration (in seconds or milliseconds) during which Pro Expander stays in effect after the initial attack occurs. This can keep processing in effect for longer periods of time with a single crossing of the threshold. It can also be used to prevent gate chatter that may occur if varying input levels near the threshold cause the gate to close and open very rapidly.

HysteresisThe Hysteresis control lets you adjust whether or not the gate rapidly opens and closes when the in-put signal fluctuates near the Threshold. This can help prevent undesirably rapid gating of the signal. This control is only available when Ratio is set to Gate.


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Dry MixThe Dry Mix control sets the balance between the processed signal (wet) and the original signal (dry). The Dry Mix setting determines how much of the original signal is sent to the output rather than the processed signal. For example, at 30%, the out-put will be 30% dry and 70% wet. Turn the Dry Mix knob counterclockwise to 0% to pass only the pro-cessed signal (100% wet). Turn the Dry Mix knob clockwise to 100% to pass only the input signal (100% dry).

LookaheadThe Lookahead control lets you add a certain amount of delay in milliseconds for analyzing in-coming audio. All attack transients take a certain amount of time from the onset of the signal to the actual transient peak (especially those with lower frequencies, like a kick drum). Adjust the Looka-head time to ensure that processing with an Attack setting of 0 (or at least very short) can be accurate to the true attack time of transients in the signal.

Note that as soon as Lookahead is engaged, the full amount of delay time is added to the Pro Expander plug-in processing latency. When Lookahead is set to Off, no additional latency is incurred.

You can compensate for plug-in processing delay using Automatic Delay Compensation in Pro Tools. For more information, see the Pro Tools Reference Guide.


Side-Chain ProcessingDynamics processors typically use the detected amplitude of their input signal to trigger gain re-duction. This is known as a side-chain signal. Pro Expander provides filters for side-chain processing and supports external key side-chain capabilities.

With external key side-chain processing, you can trigger dynamics processing using an external sig-nal (such as a separate reference track or audio source) instead of the input signal. This external source is known as the key input.

With side-chain filters, you can make dynamics processing more or less sensitive to certain fre-quencies. For example, you might configure the side-chain so that certain lower frequencies on a drum track trigger dynamics processing.

SourceThe Source selector lets you set the source for side-chain processing: Int-Stereo Pairs, Ext-All (w/LFE), Int All (no LFE), or Int-Front/Rear.

Side-Chain section

Selecting the Source for side-chain processing

Internal Source—Stereo Pairs

When Int-StereoPairs is selected, processing is triggered for both the Left and Right channel when the input signal reaches the threshold on either the Left or the Right channel. With greater-than-stereo multichannel processing, the input signal for each stereo pair affects only those same channels, and likewise mono channels are affected only by their own input signal. For example, with an LCR mul-tichannel format, the processing for the Center channel is only triggered when the Center channel input signal reaches the threshold. However, when the input signal reaches the threshold on the Left or the Right channel, processing is triggered for both the Left and the Right channel.

External All (with LFE)

When Ext-All (w/LFE) is selected, the plug-in uses the amplitude of a separate reference track or ex-ternal audio source to trigger dynamics processing. Dynamics processing is applied equally to all channels when the input signal reaches the thresh-old on any input channel. With greater-than-stereo multichannel processing, the key signal triggers dynamics processing for all processed audio chan-nels equally.

The reference track used for side-chain processing is selected using the Plug-In Key Input selector in the Plug-In window header.

Internal–All (No LFE)

When Int-All (no LFE) is selected, dynamics pro-cessing is applied equally to all channels when the input signal reaches the threshold on any input channel, except for the LFE channel (if present). The LFE channel is processed independently based on its own input signal.

Internal Front/Rear

For LCRS or greater channel formats, when Int-Front/Rear is selected, dynamics processing is applied based on front channel inputs (LCR) and surround channel inputs (S) independently. For “.1” formats, the LFE channel is processed inde-pendently based on its own input signal.

Configuring a key input for side-chain processing


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Side-Chain Listen ModeListen mode lets you hear the input signal for the side-chain to the compressor. This can be either the external key input or the internal side-chain (in-cluding the applied filter).

To enable (or disable) Listen mode on the side-chain:

Click the Listen button in the top-right corner of the Side-Chain section so that it is highlighted. To disable it, click the button again so that it is not highlighted.

Side-Chain Listen mode enabled

Attenuation Listen and Side-Chain Listen can be enabled simultaneously, in which case At-tenuation Listen is audible but Side-Chain Listen is not.


Side-Chain Filter On/OffYou can use the Side-Chain input with or without filtering by enabling or disabling the Side-Chain Filter On/Off button.

To enable (or disable) filtering on the side-chain:

Click the Side-Chain Filter On/Off button on the right side of the Side-Chain section so that it is highlighted. To disable it, click the button again so that it is not highlighted.

Side-Chain Filter enabled

Side-Chain Filter

Filter Frequency

The Freq control lets you set the center frequency for the selected Filter Type (from 20 Hz to 21.0 kHz).

Filter Q

When the Filter Type is set to Band Pass or Notch, the Q control is available. The Q control changes the width of the filter around the center frequency band. Higher Q values represent narrower band-widths. Lower Q values represent wider band-widths.

Filter Type

Four Filter Type options are available for side-chain processing:

Low Pass Select the Low Pass option to apply a low pass filter to the side-chain processing at the selected frequency.

High Pass Select the High Pass option to apply a high pass filter to the side-chain processing at the selected frequency.

Notch Select the Notch option to apply a notch fil-ter to the side-chain processing at the selected fre-quency.

Band Pass Select the Band Pass option to apply a band pass filter to the side-chain processing at the selected frequency.

Side-Chain Processing Graph

The Side-Chain Processing Graph display shows the frequency curve for the selected Filter Type at the selected Filter Frequency.


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