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 other devices on a network. 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. These can be inspected and controlled on the device itself, with the web remote, or
using a JSON API.
Audio Streaming
The M-32 DA Pro has eight outgoing and eight incoming stream ports. Each one can be configured to
contain 1-8, 12 or 16 audio channels in AAF or AM824 format, or 0 audio channels in CRF format.
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. Talker and listener must support the stream format and channel count.
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 web 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:
1. Open the M-32 DA Pro web remote in a browser (see
Section 8.5.1, “Finding the Device on a Network”
)
2. Press the
identify
icon. The front panel level meters of the controlled device will show an
animation.
RME M-32 DA Pro User’s Guide
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| 5. AVB Connectivity
