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5. AVB Connectivity
Network Control
The M-32 DA Pro is an AVB endpoint device that can be configured with the IEEE Standard for Device
Discovery, Connection Management, and Control Protocol for IEEE 1722™ Based Devices, in short:
AVDECC.
This device does not provide an AVDECC controller for connected devices. To establish
an AVB connection between devices, a separate controller is required.
There are several AVDECC controllers available for download from different manufacturers that support
the commands required to
• identify the device,
• adjust its sample rate and clock source, and
• create connections to or from it.
The RME Digiface AVB includes an AVDECC controller.
Many other configuration options of the M-32 DA Pro are at this time not implemented in generic
AVDECC controllers. Both the control on the device and its web remote can be used to configure
additional options.
An AVDECC controller can optionally acquire the device. This means that the M-32 DA
Pro is no longer configurable by display or web remote until the acquisition is released.
Audio Streaming
The M-32 DA Pro has four outgoing and four incoming stream ports. Each one can be configured to
contain 4, 8, 12 or 16 audio channels.
In order to establish a connection (stream) between two AVB devices, the following conditions must be
fulfilled:
1. There must be a physical connection between the devices.
2. All switches between the devices must be certified AVB switches (or compatible).
3. An AVDECC Controller is required to find the devices and to connect them.
4. The stream port size must be identical at sender and receiver.
A stream between two AVB devices is deterministic, has a fixed latency, and reserved
bandwidth.
5.1. Identifying a Device Remotely
When several M-32 DA Pros are connected to the same network, each device has its own remote
control. To quickly reveal which device is currently being controlled, the HTTP remote and any AVDECC
controller can send an Identify command. This triggers an animation of the front panel level meters of
the corresponding device.
To start device identification with the web remote:
RME M-32 DA Pro User's Guide
5. AVB Connectivity | 16
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