It is not possible to select separate settings for each MADI port. Both ports will be affected
regardless which output tab is used to change the setting.
10.3.2. MADI Daisy Chains
MADI is a uni-directional protocol with a fixed number of channels. When more than two MADI devices
are connected, a serial connection is required. This is also referred to as a "daisy chain". The output of
the first device is connected to the input of the second device, the output of the second device to the
input of third device, and so on, until the signal is plugged into the input of the first device.
It is important to understand that each device must be programmed to pass on audio from its MADI
input to the MADI output. Otherwise, the last device would only receive the channels of one device.
While many RME devices pass on MADI signals automatically, the AVB Tool must be
explicitly configured to do so.
In order to pass on signals, configure the output routing of the required output port to pass on the signal
from the MADI input port.
The latency of the MADI I/O is four samples.
The AVB Tool creates an entirely new output signal and does not pass on any embedded
information. One exception are SysEx messages (incl. MIDI over MADI) that are passed on
between the ports chosen in the MIDI Remote settings.
10.3.3. MADI Port Mirroring
A redundant MADI connection protects from loss of audio in case of a single cable failure. To achieve
redundancy, the receiver must support MADI redundancy. The sender must send two identical MADI
signals on two outputs, usually the coaxial and optical ports.
The AVB Tool features independent routing for both MADI output ports. For this reason, a "mirroring" of
the signal must be manually created. In order to do this, the routing of the two MADI outputs should be
configured to contain the same routing.
The receiving device usually ignores the audio contents of the two MADI signals. Therefore,
the redundancy may appear to be set up even though the AVB Tool sends different audio
signals on both ports.
10.4. AVB Output Streams
The AVB streams
leaving
the AVB Tool are described as "output streams". In this case, the device acts as
a
talker
. The talker defines the
presentation time
and therefore the latency across the network. This is set
per default to
2 ms
.
The output streams of the AVB Tool are by default
empty
, containing a clock signal but no audio signal.
To send audio with AVB, a
routing
must be created for each outgoing stream.
To establish a connection between a talker and a listener, an
AVDECC controller
is required. The AVB
Tool does not include an AVDECC controller.
Outgoing AVB streams are monitored by the device as follows:
RME AVB Tool User’s Guide
10.4. AVB Output Streams |
60
Summary of Contents for AVB Tool
Page 2: ...RME AVB Tool User s Guide...
