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AEQ Audio Over IP
Routing System
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In addition, the device must be also configured as master or slave (depending on the
configuration that will be applied by "Dante Controller") by means of the specific software of
the device ("NetBox Tool").
About Clock Domains.
Dante Devices that are not configured with sample rate pull-up/down operate on the default
clock domain, using the default clock. Devices that are configured with sample rate pull-
up/down operate on separate 'clock domains', which have their own dedicated PTP clocks,
adjusted to account for the pulled up/down sample rates.
Clock domains are not physically separated, they all exist on the network simultaneously.
Devices with pull-up/down synchronise to the appropriate clock for their pull-up/down setting,
and ignore other clocks. Those devices are shown with the relevant pull-up/down value against
their Clock Status in the Clock Status tab.
Dante devices can only transmit audio to, and receive audio from other devices on the same
clock domain. For example, a device with zero sample rate pull-up/down operates on the default
clock domain, and cannot transmit audio to, or receive audio from any devices on the +4.1667%
clock domain, or the -1% clock domain, etc.
Up to 5 separated clock domains can be supported at any one time. All clock domains have
their own master clock.
In DDM networks, each Dante domain typically uses its own special clocking domain (except in
the case of audio sharing between domains, when multiple Dante domains will share the same
clock domain).
About Master Clocks.
The Dante network master clock (often also referred to as the 'Grand Master'), is displayed at all
times in the center of the toolbar of the Network View. This is the device that is providing the
time sync source for all devices on the network.
If multiple clock domains are in use, the master clock for each domain is shown, in a comma-
separated list.
The master clock is chosen automatically through an election process, though there are user
configurable parameters that allow prioritization of some devices in the master clock election.
Configuring a device to have an external word clock source will force that device to become
master clock, unless another device has 'Preferred Master' set.
Checking the 'Preferred Master' flag will always result in that device (or the device with the
lowest MAC address, if more than one device has been checked) becoming master clock for
that domain.
NOTE: If the master clock device is not directly visible to "Dante Controller" (for example, if the
master clock device is for some reason only connected to the secondary network, and "Dante
Controller" is only connected to the primary network), the 'Master Clock' display in the toolbar
may show a MAC address string, instead of the device name.
Clock Status Monitoring.
Dante devices are monitored by "Dante Controller" to establish the status of their clock
synchronization with the Dante network master clock.