Meyer Sound Galileo GALAXY 408, User Manual

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GALILEO GALAXY USER GUIDE
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AVB Control Mode: network digital source signals may be connected to the AVB/Network port connectors (labeled 1 and
2) on the GALAXY processor rear panel. These connectors allow for the usage of Milan-compliant AAF streams for Audio
(see the AVB Networking Guide, available at
https://meyersound.com/documents ).
Milan-compliant AAF and CRF streams are supported for Clocking. There are two modes: Internal and External. Internal
Mode allows the GALAXY Internal AVB connection manager to control all AVB Input Streams. External Mode disables
the GALAXY Internal AVB connection manager and allows an external Milan controller to connect the AVB streams.
Only one signal type can be selected for each input. Outputs from available GALAXY processors will populate the AVB
browser when that device is selected from the available Devices list. The Group can be selected from the Group
selection menu. Connections can be established and disconnected.
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AVB Stream Info: to access the AVB Stream Info, press the “Info” button on the Input and Output tab GUI, opening a
secondary window. The left side lists data about the Primary input source and the right side lists data about the
Secondary input source.
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Channel Selection: “selected” channels are linked. Changes made to one selected channel will be made to all other
selected channels of the same type (input or output) in a device. Depending on the Global Link Preferences, channels on
other devices may be affected as well. Use Link Groups (see “Link Groups” on page 36) to quickly select or deselect
multiple channels. Selected channels have a green background.
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AVB Output Settings: the Default Presentation Time can be set for each GALAXY processor on the Network from
0.250–2 ms; the default value is 2 ms. Reducing the value of the Presentation Time will lower the latency of the AVB
stream output from a talker to a listener. The MSRP Accumulated Latency will display the worst case time through the
network, and can be used as a reference of how low the Default Presentation Time can be set. In some cases, it is
desirable to use a lower latency, which can be accomplished by reducing the Default Presentation Time. The Default
Presentation Time should never be set lower than the MSRP Accumulated Latency.
For more information about network configurations and a discussion about Presentation Time, see the AVB Network
Guide (PN 05.010.541.01) available at
https://www.meyersound.com/documents
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System Clock: the GALAXY System Clock can be configured to either the Internal Clock, an AVB Clock CRF, an AES
input, or an AVB AAF Input. For the GALAXY 816-AES processor, the Word Clock (BNC connector) can also be
configured as the GALAXY processor Media Clock. This option allows the GALAXY 816-AES3 processor to be
synchronized to an external source for both the system clock and AES output clock, at 48 or 96 kHz. AES allows discrete
values in the range from 20–216 kHz (see “Input Sample Rates” on page 62).
NOTE: “Media Clock” is the common terminology used in the Milan specification. Within the GALAXY
processor Settings: Input and Output tab, the Media Clock choice is selected under the “System Clock: Clock
Mode” pull-down menu.
NOTE: When an incoming 96 kHz AES signal is selected as a clock source under the system clock pull-down
tab, disable the Asynchronous AES sample rate converters to reduce latency through the system. These ASRC
converters are only available on the AES inputs and only required when the incoming AES signal does not
match the 96 kHz internal clock frequency to /- 100 ppm.
CAUTION: When AES ASRC is enabled on an input, the clocking data associated with that input is removed
by the GALAXY processor, and that input may not be used as a valid System Clock.
CAUTION: All AVB inputs must be synchronized to a common media clock, and the clock must originate from
one of the incoming AVB sources and cannot be daisy-chained (see “Common Media Clock for Multiple
Interconnected GALAXY Processors” on page 60).
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Input/Output Voltage Range: allows the user to set analog channels to 16 dBu or +26 dBu. These settings only
apply to analog channels.
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