Setup
Expand the AoIP portion of the Interfaces menu, then select Setup.
Important: The screenshots here show the available controls with Show Expert Settings (H) enabled, and require a solid understanding of AoIP to avoid situations that may cause issues that are not immediately apparent.
AoIP (A)
Enable - Enables or disables the AoIP interface.
Sync Source (B) - Displays the sync source and indicates if the clock is locked (green dot) and shows the name of the interface where PTP is received.
Leader ID (C) - shows the MAC address of the current PTP leader
Management Interface (D), Media Interface 1 (E), Media Interface 2 (D)
All three interfaces work identically.
Interface - Selects the respective LAN interface by its system name.
Link State - Indicates the status of the selected LAN interface (green = Up).
IP Address - Displays the IP4 address of the selected LAN interface.
Livewire (G)
LWRP (Livewire Routing Protocol) Password Status - Indicates whether or not a Livewire password has been set or not set.
LWRP Password - The field in which a password may be entered. Toggling the "eye" symbol to the right of the text field allows the password to be visible. Click <APPLY> to save the password. If done the Apply button changes to <CLEAR PASSWORD>.
256 Ch Extension License (I) The flexAI core license limits the number of audio channels to 256 for the receivers and the transmitters. If you must use more that this number you must acquire another such license. The field Claimed Extensions below shows the respective number.
Packet Processing With the introduction of the new High-Efficiency Audio-over-IP (XDP), the user can optimize the system's performance. In general, once the XDP mode is enabled (J), the system load reduces significantly, and packet sizes of 0,125 ms, 0,25 ms and 0,5 ms are unlocked on the transmitter end. However, as the load on an AIXpressor can still be high due to the high packet density, we have introduced a switch <Interval> that allows the user to balance the system between speed and CPU load. The decision is influenced by whether the short packet sizes are needed to optimize latency or if it's solely about transmitting a high number of channels per stream.
If the goal is a high number of channels, it may be sufficient to transmit packets every 1 ms (several packets in burst mode), significantly relieving the system. On the other hand, if low latency is crucial, the packets must be sent at the same interval as the set packet size, but this simultaneously increases the system load. Rule of thumb for Packet Sizes below 1 ms:
Small Packet Size + Small Packet Processing Interval = Low Latency + Higher System Load
Small Packet Size + Large Packet Processing Interval = Slightly Higher Latency (corresponding to interval setting) + Lower System Load. For Packet Sizes equal or above 1 ms the interval setting has no relevance.
NMOS Registry (K)
This colume is meant to set the NMOS IS-04 Discovery Mode. I.e. how the device finds a NMOS registry in the network.
Status (L)
Connection - Connected (green dot) / Unconnected (red dot)
Host - IP address of the NMOS registry host
Port - of the IP connection to the host
Version - of the registry implementation
Settings (M)
Discovery Mode - - Multicast DNS-SD (mDNS) flexAI is looking for a NMOS Registry Server by using mDNS. - Unicast DNS-SD flexAI is looking for a NMOS Registry Server by using Unicast DNS within the selected Domain - Manual You may set the host IP4 address and the port number of the Registry Server to query
Domain Domain name of the network for manually connecting to a NMOS regestry
Host IP address of the NMOS regestry for manually connecting
Port Port number of teh NMOS regetry for manually connecting
Query Registry ON / OFF
A NMOS Registry Server in turn will query the current flexAI device by using the IP4 address on port 3212 of the management interface
Receiver (N)
Remaining Licensed Channels
Remaining Licensed Streams
Auto Link Offset / Delay (O)
Will be used by the receiver when Auto Link Offset is turned on, to automaticaally deal with the network latency. Should be set in relation to the duration, in microseconds, of the latency present in the network. See AES67-2018 (page 20) that illustrates the link offset definition. Generally speaking, setting a value of three times the packet time selected in the Sender will provide more robust timing though with a small increase in overall latency. Separate fields are provided for each of the supported packet time options.
Stream Naming (P)
One may use the name from the sender stream or set an own stream name
Discovery (Q)
Discovery Protocol Filter - The Discovery Protocol Filter can be set to either look for Livewire, SAP/AES67/ST2110, or NMOS/AES67/ST2110 when searching for streams in the network.
Default Name Filter field is provided to assign the filter a unique name to be used in the stream setup process.
Sender (R)
Remaining Licensed Channels
Remaining Streams
Auto DSCP (S)
Allows for selecting the appropriate QoS - Differentiated Services Code Point for each of the supported packet time options.
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