User Guide — Nebra
![]() |
Software Tools Platform |
Nebra is part of the Meyer Sound Tool Box, enabling AVB Milan connection management, loudspeaker telemetry reporting, and firmware updates.
The latest version of Nebra is compatible with macOS 13 (Ventura) and Windows 11 Professional.
Included functions:
AVB Connection Manager: To establish Milan AVB connections, a simple drag-and-drop interface is used. Rather than presenting all of the possible connection points of all devices, Nebra only presents the available channels of the two devices. Milan-certified network switches are required for Milan connections and digital audio transport. Visit avnu.org for a listing of certified network switches.
Telemetry Monitoring: Nebra monitors the telemetry data from Milan-based devices over standard Ethernet, including Meyer Sound loudspeakers with equipped with Milan end-points. For Meyer Sound loudspeakers using RMS technology, Nebra functions in parallel with Compass software and the RMServer hardware. A Milan-certified network switch is not required for this function.
Updates: When a computer running Nebra is connected to the Internet, if new versions of Nebra or device firmware are available, they will be automatically downloaded. Notifications advise users if action is needed or recomended.
User Guide — Nebra

Nebra is part of the Meyer Sound Tool Box, enabling AVB Milan connection management, loudspeaker telemetry reporting, and firmware updates.
The latest version of Nebra is compatible with macOS 13 (Ventura) and Windows 11 Professional.
Included functions:
AVB Connection Manager: To establish Milan AVB connections, a simple drag-and-drop interface is used. Rather than presenting all of the possible connection points of all devices, Nebra only presents the available channels of the two devices. Milan-certified network switches are required for Milan connections and digital audio transport. Visit avnu.org for a listing of certified network switches.
Telemetry Monitoring: Nebra monitors the telemetry data from Milan-based devices over standard Ethernet, including Meyer Sound loudspeakers equipped with Milan end-points. For Meyer Sound loudspeakers using RMS technology, Nebra functions in parallel with Compass software and the RMServer hardware. A Milan-certified network switch is not required for this function.
Updates: When a computer running Nebra is connected to the Internet, if new versions of Nebra or device firmware are available, they will be automatically downloaded. Notifications advise users if action is needed or recommended.
Getting started

Download Nebra software

Click the link that corresponds to your computer’s operating system.
Locate the downloaded .zip file in Finder (usually in the Downloads folder) and double-click it to expand the .zip file. The installer file will be added to the same folder.
Double-click the
nebra-1.x.x_mac.pkg
installer file to launch the installer.Agree to the Terms of Use.
In the window that opens, drag the Nebra icon to the Applications folder.
From the Applications folder, launch Nebra.
Note
There may be an operating system pop-up if the AVDECC driver is not installed, click OK to install the driver.
Locate the downloaded .msi file in Explorer (usually in Downloads folder) and double-click it to show the contents.
Double-click the
nebra-1.x.x_mac.msi
installer file to launch the installer.Click though the Nebra Setup Wizard and accept the End-User License Agreement (EULA).
Click NEXT to install the software in the default file path or select another location.
Select YES to allow the app to make changes.
To launch Nebra, navigate to
C:\Program Files\Meyer Sound\Nebra
and double-click theNebra.exe
file.Note
There may be an operating system pop-up if the AVDECC driver is not installed, click OK to install the driver.
Another notification may open asking permission to make changes to osascript. Allow this change by entering the operating system user password and then click OK.
Network switch requirements

A standard 100bT, IPv6 enabled Ethernet switch is required to transport device telemetry data. An Avnu-certified AVB network switch is not needed.
For Milan digital audio transport, an Avnu-certified AVB network switch is required. These switches support Milan functions. A list of Avnu-certified hardware, including network switches, is available at Avnu Alliance.
First launch

While the computer is connected to the Internet, launch the Nebra application. Enter your Meyer Sound Account credentials to login (same as meyersound.com login credentials).
Connect the computer running Nebra to the same network that Milan AVB devices are connected to. The first Nebra computer (Nebra server) must have a wired network connection. Additional computers can access Nebra via a web browser (client), with a wired or wireless connection to the network. Nebra will auto-detect the available devices connected to the network.
The following devices are discovered by Nebra software:
Avnu-certified network switches
Meyer Sound Milan AVB-enabled devices (includes telemetry):
Galileo GALAXY processors
Milan endpoint loudspeakers
These Meyer Sound devices transmit Telemetry data:
Loudspeakers equipped with Milan endpoint modules
RMServers
Loudspeakers equipped with RMS modules (via RMServer)
MPS power supplies (power Intelligent DC Loudspeakers)
Other Milan AVB-enabled devices that are commonly available:
Mixing consoles
Format converters
Microphones
Amplifiers
Signal processors
Workflow

User Interface Overview

Hamburger Menu: Sign Out, links to Help, Support, and View Logs
Device Manager
Connection Manager
Snapshots
Settings: Network display, Media Clock Master selection, Notifications preferences, and Display Settings options
System Health Indicator and Event Log
Workspace Focus indicator
Application Search
Hide/Show Properties Sidebar
Getting Started

Modify the default Device Names
Select DEVICES ( below). Click on a device type header (Processor, Milan Loudspeakers, etc.) to expand/collapse the list of devices by type. For each listed device, double-click the name and modify the text (
below). These names are stored in the devices and are used to correlate devices listed in software to the physical devices.
Tip
For arrays, a good strategy is to start each name with a number to indicate position in the array followed by a letter or combination of letters to denote the array. This aids when searching for devices and sorting columns. The number at the end of the default name is the serial number of the loudspeaker. For example:
01 Left Main Panther
02 Left Main Panther
Note
For network switches, the last three octets of the Milan identity name match those of the device's MAC address. If renaming, including the last three octets may be helpful. For example:
FE-A0-6B-64, renamed: FOH Primary A0-6B-64
Duplicate device names within the same group name are not allowed.
To match devices listed in Nebra to physical devices, use the Wink function. Click once on a device in Devices ( below) or a device in the Connections Workspace to open the Sidebar panel. Click the Wink icon (
below) to turn on the device’s Wink LED(s). Conversely, press the Wink button on the device, which will be indicated in Nebra.

Nebra, Devices – Click Wink Icon to Turn on Device’s Wink LED
Note
The Wink function of PANTHER and 2100-LFC loudspeakers automatically times out after several seconds. The Wink function of other loudspeakers and devices is active until the Wink icon in Nebra is clicked or the Wink button on the device is pushed.
To change the device name, double-click the device name at the top of the Sidebar panel.

Nebra, Devices – Double-Click Default Group Name, Type to Modify
Designate a device as the Master Media Clock
Click Settings ( below), click Media Clock (
below), click Set Media Clock (
below), and then select a device as the system Media Clock (
below). Click Apply in the dialog to make the designation.

Nebra, Settings – Set Media Clock – Settings, Media Clock, Set Media Clock, Select Device
Establish Milan connections

Nebra, Connections – Make Milan Connection Between Talker and Listener
Steps illustrated above:
Select CONNECTIONS
Click to expand Available Devices
Click-drag a Talker (Galileo GALAXY processor) to Workspace
Click-drag Lister (loudspeaker), drop on a Talker, Connection Matrix opens (method 1)
Select which Talker Output to connect to the Lister
Click BACK
Select another Listener and drag into the Workspace
Select Connect
Drag from the Talker to the Listener (method 2)
Select which Talker Output to connect to the Lister
Click Back
Select Delete
Click on a connection line to un-make the connection
Click on a device to remove the device from the Workspace
Note
While making connections, it is normal for the Health Status indicator to indicate device thresholds have been met while the devices are negotiating the network connection. Click the System Health icon to acknowledge. If there are no errors or faults, the indicator will indicate the status is OK.
Once a connection is made, click the connection line between devices to open the Connection Matrix and modify or de-select the routing.
Save a Snapshot
Select Snapshots (4), click + Create new in upper-right of application window. Name the Snapshot, click OK. Saves the devices and Milan connections in the Workspace for later recall.
View Device Telemetry
To view a device’s real-time telemetry data, click the device name in Devices or the device icon in the Workspace to open the Sidebar. Click the Telemetry tab to display the available details.

Nebra, Sidebar, Telemetry Tab – ULTRA-X20 Telemetry
Note
Hover the pointer on the temperature or voltage gauge to display numeric values.
Click the pop-out icon in the upper-right (highlighted above) to pop out the Sidebar in a separate window from the Nebra application.

Nebra – Popped Out Standalone Sidebar Window
Download loudspeaker usage data
Loudspeakers equipped with Milan Endpoints store usage data. To download a loudspeaker log to the Nebra computer, right-click the loudspeaker name listed in Devices or right-click the loudspeaker icon in the Workspace to open the pop-up menu and select DOWNLOAD LOG FILES (left, below). The three-dot menu in the Sidebar (if open) includes this option as well (right, below).

Nebra – Download Loudspeaker Log File
The .log
file is listed in a Finder window that opens.
The macOS file location is:
/Users/meyersound/Library/Logs/Nebra/Downloaded_Logs
The Windows file location is:
C:\Users\Nebra\AppData\Roaming\Nebra\Logs
System monitoring
The System Health indicator will turn from green to yellow (caution) or red (warning) when a device status threshold is met:

Click the Health Status icon to acknowledge a caution or warning.
Note
During the connection steps above, it is normal for the System Health indicator to indicate cautions and/or warnings. These are related to the momentary disconnected condition while the connection is established.
When a device status threshold is met, banners that include summary text appear at the bottom of the Workspace to alert users.

Nebra – Warning and Caution Banner Examples
Both the System Health indicator and the pop-up banners notify users that new Events have been added to the System Status Log.

Nebra – Events Tab
The macOS file location is:
/Users/meyersound/Library/Logs/Nebra/SystemReportsC:\Users\Nebra\AppData\Roaming\Nebra\Logs\SystemReports
Firmware update

How Firmware is Delivered

Each time the Nebra computer is connected to the Internet with Nebra software running, the current versions of firmware are automatically downloaded.
Firmware Update Notification

If a newer version of firmware is available for a device, a banner will appear at the top of the application window with a VIEW DETAILS button. If the top blue banner is closed, double-click on the warning icon next to the device model that needs a firmware update to update the firmware.
Update Firmware

Click the VIEW DETAILS button in the notification banner, which opens a dialog listing the devices with outdated firmware. Click either the individual INSTALL buttons for each device or the INSTALL ALL button in the top-right of the window to install the current version of device firmware.
If you have been provided firmware by some other means, move the firmware file to the Nebra computer. From the DEVICE tool, click once on a device to open the Sidebar. Click the three-dot More menu at the top-right of the Sidebar and select UPDATE FIRMWARE, opening the UPDATE FIRMWARE dialog. Click the paperclip icon to browse for the firmware file to be uploaded. Select the firmware file and click the UPDATE button.