Extron Electronics Dante Controller - Manual (Page 16)

Dante Controller User Guide
Copyright © 2013 Audinate Pty Ltd. All rights reserved. -16-
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Transmit (Tx) channel: A transmit channel transmits audio from the audio hardware onto the
network.
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Receive (Rx) channel: A receive channel receives audio from the network and sends it to the audio
hardware.
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Flow: Dante audio routing creates flows. Each flow carries several channels of audio from a
transmitter to one or more receivers. Unicast routing creates flows to single receivers. Multicast
routing creates flows that can be received by multiple receivers. Multicast flows are assigned IDs
enabling them to be identified in Dante Controller.
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Unicast routing: Unicast flows are point-to-point from a single transmitter to a single receiver.
Unicast flows typically have room for 4 channels of audio.
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Multicast routing: Multicast flows are one-to-many from a single transmitter to any number of
receivers. Use Dante Controller to choose what channels are to be multicast. Unlike unicast routing,
multicast flows consume network bandwidth even if there are no receivers, but do not require
additional bandwidth to add more receivers.
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Subscription: A subscription configures a receive channel to receive audio from a transmit channel
on another Dante device.
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Subscription status: For a receive channel, subscription status indicates whether it is subscribed,
whether it is receiving unicast or multicast audio, whether the subscription is OK, or whether an error
has occurred.
Subscription
Dante routing is performed by associating a receiving (Rx) channel with a transmitting (Tx) channel. This is
called subscription.
Example: Route Tx channels 1 and 2 (labeled “Audio L” and “Audio R”) on the device labeled
“Source” to Rx channels 3 and 4 on the device labeled “Dest”.
Rx channels 3 and 4 on “Dest” are subscribed as follows:
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3. Audio L@Source
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4. Audio R@Source
Dante will perform the necessary audio routing to deliver the audio from the Tx channels to the Rx
channels.
Redundancy
Many Dante devices support redundant audio routing. These devices have two network interfaces, labeled
primary and secondary. Primary interfaces should be connected to one physical network. If redundancy is
being used, secondary interfaces should be connected to a second separate network. Secondary
interfaces cannot communicate with primary interfaces.