Documentation
Contents
1. Introduction
Evergreen Audio provides a collection of tools to allow music, post production, live sound, and broadcast studios to meter audio in a flexible and configurable way. The tools provide sophisticated tools aimed at the professional mix engineer to work faster, more accurately, and more efficiently.
The Mini Meter plugin (Pro Tools AAX and VST3), Massive Meter plugin (Pro Tools AAX and VST3) or Massive Meter Pro plugin (Pro Tools AAX Native and DSP and VST3) work as standalone plugins or in conjunction with the Meter Bridge and Meter Bridge Pro applications to display all meters in a single, flexible view.
The Mini Meter and Meter Bridge for macOS and iOS provide a free metering solution to create a sophisticated metering solution for small studios or educational environments.
Stepping up to the Massive Meter and Massive Meter Pro combined with either the Meter Bridge or Meter Bridge Pro, the system expands to provide advanced metering and extensive customization to meter exactly as the workflow requires.
When working with multiple mix engineers each engineer can run their own Meter Bridge Pro application and configure and display which meter plugins they are most interested in seeing. This allows each mix engineer to have a personal view of meter information independent of others.
2. Products Overview
As part of Evergreen Audio products, there are several pieces of software that can be used independently or together to create simple to very sophisticated workflows.
| Product | Formats | Channel support | Metering styles |
|---|---|---|---|
| Mini Meter (plugin) | Pro Tools AAX Native, VST3 | Mono, stereo | Sample Peak, RMS, K-12, K-14, K-20 |
| Massive Meter (plugin) | Pro Tools AAX Native, VST3 | Mono, stereo, surround (e.g. 5.1, 7.1) | Sample Peak, RMS, K-12, K-14, K-20, Linear, VU, Digital VU |
| Massive Meter Pro (plugin) | Pro Tools AAX Native & DSP (HDX), VST3 | Mono, stereo, surround, immersive (e.g. 7.1.2, 9.1.4) | Sample Peak, RMS, K-12, K-14, K-20, Linear, Dorrough, VU, Digital VU, Digital PPM |
| Meter Bridge (desktop app) | macOS | Meters multiple plugins in one view; up to 8 ch. of CoreAudio (mono/stereo) | - |
| Meter Bridge (iOS) | iPadOS, free | Views Mini/Massive/Massive Pro plugins; no CoreAudio metering | - |
| Meter Bridge Pro (desktop app) | macOS | Meters multiple plugins in one view; up to 384 ch. of CoreAudio, any format | - |
3. Installation
There are installers for the different products. The combination installer (Evergreen Audio.pkg) installs all Evergreen Audio products while allowing installation of specific products. The individual installers install the individual products allowing for quick and easy installation.
In Pro Tools, the Massive Meter plugin is grouped under the Evergreen Audio company name and appears in the Sound Field category.
4. Getting Started - Quick Start
The fastest way to get started is to launch Pro Tools and instantiate the Mini Meter, Massive Meter, or Massive Meter Pro plugin and launch the Meter Bridge or Meter Bridge Pro application.
The plugins can be found under the Evergreen Audio company name and appear in the Sound Field category.
Once the Meter Bridge application is launched, a Configuration document is created and the Add and Remove Systems dialog is opened. The Pro Tools system with the Massive Meter plugin and the currently selected CoreAudio device should appear as Massive Meter. Select the checkbox for Massive Meter and click OK.
The System "Massive Meter" and the Massive Meter plugin should be displayed in the main user interface of the Meter Bridge Application.
5. Configurations and Templates - Meter Bridge Pro Only
At a glance: a Configuration remembers a specific Pro Tools system. A Template matches generic system/plugin names instead, so the same layout auto-connects across many sessions.
The Meter Bridge Pro application supports saving and restoring layouts along with automatic detection and connection to the Massive Meter plugins hosted in Pro Tools systems. This provides minimal setup and configuration time when managing complex workflows.
5.1 Configurations
The Meter Bridge Pro Configuration allows saving of specific Pro Tools systems. This stores the unique identification of the Pro Tools systems it is connected to and displays any Meter plugins that are in the Pro Tools system.
To create a new Configuration, select the File menu and the New Configuration option. Shortcut: Command-N.
5.2 Templates
The Meter Bridge Pro Template provides a mechanism to create a specific template based on the Pro Tools system name (set in the Massive Meter Plugin Settings) and Massive Meter plugin names.
The Template allows the mix engineer to create Templates that match their Pro Tools templates based on generic names. The Meter Bridge Pro automatically connects to the named Pro Tools systems and to the named Massive Meter plugins. This allows the mix engineer to switch Pro Tools sessions and use the same Meter Bridge Pro Template for many sessions.
| Action | Where | Shortcut |
|---|---|---|
| Create a new Template | File menu → New Template | Command-T |
| Configure a Template | Setup menu → Manage Template | Command-Shift-M |
| Save a Configuration as a Template | File menu → Save As Template (when a Configuration is open) | - |
Use the + and - icons to add and remove both systems and meters. Use the text editing fields to change the name of the System and Meters. Use the popup menus to select the channel format for the specific meter.
The "Include Audio Device" checkbox will add the current CoreAudio device to the Template. The CoreAudio device will be displayed based on the selected Audio Device Settings.

6. Audio Device Settings
At a glance: Audio Device Settings let the Meter Bridge / Meter Bridge Pro meter a CoreAudio device directly - independent of any plugin. macOS only.
The Meter Bridge application supports up to 8 channels of CoreAudio input (mono/stereo). The Meter Bridge Pro application supports up to 384 channels of CoreAudio input in any standard format.
6.1 Metering CoreAudio
The Meter Bridge and Meter Bridge Pro application supports metering CoreAudio devices and creating customized meter layouts.
6.2 Audio Device Settings Menu
To enable CoreAudio metering, open the "Audio Device Settings…" menu item under the "Setup" menu. Shortcut: Command-Shift-A.

The Audio Device Settings dialog enables you to create, load, and modify meter settings for specific CoreAudio devices. Settings files are stored in the Documents folder in the "Meter Bridge Device Settings" folder - copy them to and from this folder when moving between computers.
6.3 Device Settings Fields
| Field | Description |
|---|---|
| Meter Settings | Selects an existing settings file from the "Meter Bridge Device Settings" folder. |
| Display Name | Sets the name shown for this CoreAudio device, for easier identification in the Add Audio Device and main windows. |
| Input | Selects which CoreAudio device is used from the currently available devices. |
| Sample Rate | Sets the device's sample rate. Note: if multiple applications share the device, this changes the rate for all of them. |
| Buffer Size | Sets the device's buffer size. Note: if multiple applications share the device, this changes the buffer size for all of them. |
6.4 Creating, Deleting, and Default Meters
| Button | What it does |
|---|---|
| New Meter | Creates a new meter and displays it in a row. |
| Delete Meter | Deletes the meters associated with any selected row(s). |
| Default Meter | Creates a new meter for each channel available on the CoreAudio device. |
6.5 Saving Changes and Canceling Changes
Clicking OK closes the Audio Device Settings dialog and offers the option to cancel the changes, save to the existing file, or save to a new file. If no changes were made, OK simply closes the dialog without prompting.
6.6 Changing Meters
Each meter can have its name, format, and channel mapping changed.
To change the meter name, double click on the text display of the meter name - the field becomes editable. Type a new name and hit Enter to save it.
The meter format can be changed via its popup; selecting a new format clears the channel mapping.
To map input channels to meter channels, drag and drop the meter label from the I/O section onto the appropriate channel. Drag it to a new channel, or back to the I/O section, to change or clear the mapping.
7. Customizing and Managing Meters - Meter Bridge Pro Only
At a glance: naming, coloring, scaling, focusing, folding, grouping, and linking meters are all Meter Bridge Pro - only features.
The Meter Bridge Pro application and the Massive Meter plugin provide many features for customizing and managing meters.
7.1 Meter Names
Click on a meter name to reveal an icon, then a text edit field, to change the meter's name (or a linked meter's name). For linked meters, clearing the name reverts it to the default - a combination of the linked meters' names.
7.2 Meter Colors
Click on the meter name to reveal the icon, which opens a color picker to select the meter's color.
7.3 Meter Scaling
The Meter Bridge Pro application and the Massive Meter plugin support scaling the meter indicators - application-wide in Meter Bridge Pro, per-plugin in Massive Meter. Useful for focusing on a specific range of interest.
| Action | How to |
|---|---|
| Change the scaling | Click and drag the tick mark indicators left/right of the meter |
| Change an individual scale point | Command-click and drag the scale point label |
| Reset scaling to default | Double-click the tick mark indicators |



7.4 Meter Focus - Meter Bridge Pro application only
Focuses a specific meter by zooming it to fill the entire main window. Double-click a meter indicator to focus it; double-click again to return to showing all meters.
The Massive Meter plugin's magnifying glass icon shows and toggles the focus state for its meter in the Meter Bridge Pro application.


7.5 Meter Fold Down - Meter Bridge Pro application only
Folds a multichannel meter into a consolidated mono meter. Option-double-click a meter indicator to fold it down; Option-double-click again to restore all channels. A folded meter's label reads "CR," and shows the individual channel with the loudest signal.
The Massive Meter and Massive Meter Pro plugins show and toggle fold-down state via the double-meter icon below the magnifying glass icon.




7.6 Meter Groups - application only
Groups meters together into a Meter Group, associated with a system.



| Action | How to |
|---|---|
| Create a group | Command-G, or Groups menu → Create Group (name it in the dialog) |
| Auto-add meters by name | Select "Add Meters By Matching Name" - finds meters with the group's name as a prefix (e.g. group "SFX" picks up any meter starting with SFX) |
| Add/remove meters manually | Drag and drop meters into or out of the group |
| Re-run auto-add later | Menu command "Group By Name" |
| Delete a group | Groups menu → Delete Group submenu |
| Show/hide a group | View menu, same as any system or meter |
In Universe View, meters from any system can be added to any Meter Group. In Standard View, only meters belonging to that system appear in the group.
7.7 Meter Linking - application only
Links meters of the same type together - even across different systems. A linked meter shows a combined name and interlaced indicators in the original meters' colors. Useful for comparing meters, e.g. in PED/Direct workflows.
| Action | How to |
|---|---|
| Link a meter | Click the Meter Name element, then the Link Meter icon, and choose from the available meters |
| Unlink a meter | Click the linked meter's Meter Name element, then the Link Meter icon - with only one meter left selected, the linked meter disappears |
| Link more than two meters | Link two meters first, then link additional meters onto the newly linked one |




7.8 Show and Hide Systems, Meters, and Meter Groups - application
Click the System Name element to reveal the show/hide meters icon, then click it to show/hide any meter in that system. The application's View menu also has options for showing and hiding systems, meters, and meter groups directly.





7.9 Organizing Meters and Systems - application only
Click and drag a system or meter label to move it; a blue vertical line shows where it will land. In Universe View, meters can be arranged in any order; in Standard View, arrangement is constrained to each meter's own system.
8. Timecode Display - Meter Bridge Pro Only
The Meter Bridge Pro desktop application has a Timecode Display that shows timecode from a selected MIDI Timecode input (MTC), in a separate floating window or in the main window.


8.1 Setting Up an MTC Input Source
The application preferences' Timecode tab contains the settings for configuring the incoming MTC source. Use the MTC Input menu to select a source. The MTC source itself is configured in Pro Tools (or another DAW) and in the macOS Audio MIDI Setup application - consult your DAW's documentation for how to configure MTC generation.
8.2 Customizing the Timecode Display
The application preferences let you customize the timecode window's font, display location, and whether it always floats on top of other application windows.
8.3 Last Frame Of Action
Loads a file containing pairs of timecode values indicating the last frame of action of a reel and the corresponding timecode value to synchronize with - allowing multiple reels to play consecutively with a linear or custom timecode value across reels.
| Setting | Description |
|---|---|
| Frame Rate | Sets the frame rate of the Last Frame Of Action file. Should match the file's timecode values and the incoming MTC source's frame rate. |
| Load File | Loads a Last Frame Of Action file from anywhere on the system. The location persists between application launches. |
| Clear File | Clears the current Last Frame Of Action file selection. |
8.4 Last Frame Of Action File Format
A text file with pairs of timecode values separated by a space or tab, one pair per line. Example:
01:00:10:00 02:00:00:00
02:00:10:00 03:00:10:00
9. Shortcuts
The Meter Bridge Pro desktop application, the Meter Bridge iOS application, the Massive Meter plugin, and Massive Meter Pro plugin have several keyboard and mouse shortcuts allowing you to quickly change settings and work with Configurations and Templates.
9.1 Mouse Shortcuts
| Action | How to |
|---|---|
| Change the meter scale | Click and drag the meter scale indicator based on the value clicked (e.g. click -40dB and drag to the bottom to set the range from -40dB to 0dB). Double-click to reset. |
| Order systems and meters | Click and drag the meter name label; a blue line shows the drop position. |
| Zoom in on a specific meter | Double-click a meter indicator to isolate it; double-click again to show all meters. |
| Fold down a meter (Meter Bridge Pro desktop app) | Option-double-click a meter indicator; Option-double-click again to restore. |
9.2 Keyboard Shortcuts - Meter Bridge Pro desktop application
| Action | macOS |
|---|---|
| New Configuration | Command-N |
| New Template | Command-T |
| Open Configuration/Template | Command-O |
| Open Last Configuration/Template | Command-Shift-O |
| Save Configuration/Template | Command-S |
| Close Configuration/Template | Command-W |
| Save As Configuration/Template | Command-Shift-S |
| Open Add/Remove System Window | Command-Shift-D |
| Open Manage Template Window | Command-Shift-M |
| Open Audio Device Settings Window | Command-Shift-A |
| Open Preferences Window | Command-Shift-P |
| Create Meter Group | Command-G |
| Change/Toggle Universe View | Command-U |
| Refresh System Information | Command-Shift-U |
10. Preferences
At a glance: the Meter Bridge Pro application and Massive Meter plugin share most preference categories. Each preference below is marked as application-only, plugin-only, or both.
To access Meter Bridge Pro preferences, use the menu item under the Massive Meter Application name or the Setup menu (shortcut: Command-Shift-P). To access Massive Meter preferences, click the gear icon in the plugin's upper right corner.
10.1 Metering - application and plugin


| Preference | Applies to | Description |
|---|---|---|
| Preset | App & plugin | Shortcut for setting a group of preferences to a common configuration. Not saved to Preferences itself. |
| Meter Type | App & plugin | Instant, Peak, RMS, Linear, Dorrough, K-12, K-14, K-20, VU, Digital VU, or PPM Digital. |
| Peak Hold | App & plugin | How long the Peak indicator holds. "Until Next Play Start" holds it until Pro Tools next plays. |
| Clip Indicator | App & plugin | How long the Clip indicator shows a clip. "Until Next Play Start" holds it until Pro Tools next plays. |
| Tick Marks | App & plugin | Which tick mark indicators are shown next to the meters. |
| Segment Size | App & plugin | Size of the meter segment/LED when Segmented Style is enabled; no effect otherwise. |
| Max Meter Bar Width | App only | Maximum pixel width of a meter bar (default 200px) - useful when organizing meters across multiple rows. |
| Show Meter Name | App & plugin | Shows the meter name in the plugin and Meter Bridge. |
| Meter Name On Bottom | App & plugin | Positions the meter name at the top or bottom. |
| Show Channel Label | App & plugin | Shows the channel label in the plugin and Meter Bridge. |
| Channel Label On Bottom | App & plugin | Moves the channel label to the bottom while the meter name stays on top. |
| Show Meter Values | App & plugin | Shows meter values for each channel. |
| Meter Values On Bottom | App & plugin | Moves meter values to the bottom while the meter name stays on top. |
| Signal Present Indicator | App & plugin | Displays a signal-present indicator at the bottom of the meter bar - useful when scaling so negative infinity isn't the lowest visible value. |
| Segmented Style | App & plugin | Switches the meter display from solid color to an LED-style segmented display. |
10.2 Display - application and plugin


| Preference | Applies to | Description |
|---|---|---|
| Refresh Rate | App & plugin | Low (15 FPS), Standard (30 FPS), or High (60 FPS). Higher = smoother but more CPU. |
| Use Small Header | App only | Custom, smaller window header instead of the standard macOS header - minimizes UI size. |
| Always On Top | App only | Keeps the main application window above others, e.g. the Pro Tools Mix/Edit window. |
| Rows In Universe View | App only | Displays 1 - 5 rows in Universe View (overridden by Meters Per Row if set). |
| Meters Per Row | App only | Sets a specific meter count per row in Universe View; 0 defers to Rows In Universe View. Useful for high channel-count CoreAudio devices. |
| Spacing Between Meters | App only | Narrow, Standard, or Wide spacing for visual separation. |
| Universe View | App only | Hides the System name UI element. Requires closing/reopening the Configuration or Template to take effect. |
| One System Per Row | App only | Displays systems on individual rows (Standard View). |
| Display Peak/Clip In Pop Up | App only | Shows a popup naming the meter that clipped or passed the peak threshold; click to clear it. |
| Peak Level For Pop Up | App only | dB threshold for the yellow Display Peak/Clip In Pop Up warning. |
| Follow Plugin Colors | App only | Meters follow the Massive Meter plugin's color changes. |
| Follow Plugin Order | App only | Meters follow Pro Tools track order; reorder on track move. |
10.3 Color - plugin

Meter Color - displays and allows changing the plugin's meter color.
10.4 Plugin - plugin

| Preference | Description |
|---|---|
| Custom Track Name | Overrides the plugin's displayed meter name (defaults to the track name). Clear the field to revert. Also used by Meter Bridge Pro to map plugins to meters in Templates. |
| Meter Delay (Massive Meter Pro only) | Delays a specific meter by a number of samples, for aligning meters out of sync due to complex routing. |
10.5 System - application and plugin


| Preference | Description |
|---|---|
| System Name (plugin) | Names the system the Massive Meter is on (e.g. Music, Dialog, Effects, Recorder) - shown throughout Meter Bridge Pro. System-wide setting, applies to all Massive Meter plugins on the computer. |
| Network Interface | Selects which network interface handles plugin ↔ application communication. Saved at the system level. |
| Version | Shows the software version number. |
10.6 Timecode - application

| Preference | Description |
|---|---|
| MTC Input | Selects the MIDI input device to read MTC from - should match the source in Pro Tools or your MTC generator. |
| Display In Meter Window | Shows the timecode readout at the top of the main window. |
| Use Small Header | Custom, smaller Timecode window header instead of the standard macOS header. |
| Always On Top | Keeps the Timecode window above others, e.g. the Pro Tools Mix/Edit window. |
10.7 Audio Devices - application

Default Meter Name - sets the default name prefix for meters created in the Audio Device Setup dialog. Helpful for high-channel-count devices, e.g. auto-naming a 64-channel device "Onyx - 1," "Onyx - 2," etc.
11. Meter Bridge iOS Limitations
The Meter Bridge iOS application is a free companion application that can be run on an Apple iPad. Metering CoreAudio devices is not supported on iOS.
The Meter Bridge has several limitations when working with the Mini Meter, Massive Meter, and Massive Meter Pro plugins. It has additional functionality when connected to Massive Meter Pro plugins, and can connect to multiple Pro Tools systems running the Meter Bridge Pro plugin.
There are limitations when the Meter Bridge is connected to a Massive Meter plugin (AAX or VST3): the application only allows one system plugin host (Pro Tools or other DAW) to be connected at a time, and it does not allow mixing Massive Meter and Massive Meter Pro plugins.
12. About Us
The Evergreen Audio Design Group was founded by Bob Brown, who is the designer and software architect of the Meter Bridge and Massive Meter.
Bob Brown is a long time media industry software engineer. He worked as a team member of the Digidesign and Avid software engineering team. As part of the Pro Tools software team, he worked on many features including Avid Satellite, audio/video synchronization, collaboration, file interoperability, and many other features. He was also part of the DTS (Xperi) immersive audio software team developing DTS|X content creation tools including the MDA Creator Suite.