Multicast UDP connections can be established by CENTAURI’s of type 300x, 330x, 400x, MERKII and GANYMED’s 1102.
The main difference between Unicast and Multicast is described in Multicast versus Unicast.
The basics of Multicast are described in application note 9 on Mayah website (www.mayah.com/content/download/pdfs/appnotes/centauri/a_n_e_009.pdf).
Multicast UDP connections can be established between
| • | CENTAURI’s, MERK’s II and GANYMED’s 1102: can be used as Multicast Sender and Multicast Receiver. |
| • |  and GANYMED 1002 |
1. Multicast UDP connection to other CENTAURI, MERKII and GANYMED 1102
It must be distinguished between the Multicast sender and Multicast receivers.
1.1 Multicast Sender
The Multicast sender determines the quality of the Multicast stream.
1.1.1 Codec Settings
Configure the codec settings via menu item Settings/Codec:
| • | Encoder dependency: Local |
| • | Decoder dependency: Remote |
The audio quality of the multicast stream is determined by the encoder settings of algorithm, sample rate, bit rate and mode of the Multicast sender.
1.1.2. Establish Connection
Click the CONNECT button to open the Connect-dialog:
| • | Select interface to IP |
| • | Select UDP |
| • | Type in the Multicast IP-address (e.g. 225.0.0.2) Note: A special port can be selected by the optional suffix ‘:<port number>’ (e.g. 225.0.0.2:5004) |
| • | Click the OK-button to establish connection |
1.2 Multicast Receiver
The quality of the audio received by Multicast is determined by the Multicast Sender.
1.2.1 Codec Settings
Configure the codec settings via menu item Settings/Codec:
| • | Encoder dependency: Remote |
| • | Decoder dependency: Remote |
1.2.2 Establish Connection
Click the CONNECT button to open the Connect-dialog:
| • | Select interface to IP |
| • | Select UDP |
| • | Type in the Multicast IP-address (e.g. 225.0.0.2) Note: A special port can be selected by the optional suffix ‘:<port number>’ (e.g. 225.0.0.2:5004) |
| • | Click the OK-button to establish connection |
2. Multicast UDP connection to GANYMED 1002
is the Multicast sender and GANYMED 1002 is Multicast receiver.
2.1 Multicast sender
2.1.1 Codec Settings
Configure the codec settings via menu item Settings/Codec:
| • | Encoder dependency: Local |
| • | Decoder dependency: Remote |
The audio quality of the multicast stream is determined by the encoder settings of algorithm, sample rate, bit rate and mode of the Multicast sender.
2.1.2. Establish Connection
Click the CONNECT button to open the Connect-dialog:
| • | Select interface to IP |
| • | Select UDP |
| • | Type in the Multicast IP-address Click the OK-button to establish connection |
2.2 Multicast Receiver (GANYMED 1002)
The configuration of the GANYMED 1002 must be done via direct commands entered via a telnet session or the program twschat. The direct commands of the GANYMED 1002 are described in the GANYMED 1002 manual.
2.2.1 Establish Connection
2.2.1.1 Create Multicast entry in GANYMED 1002
In GANYMED 1002 up to 9 Multicast entries can be stored with the command mcast_set. The command syntax of mcast_set is:
mcast_set <param1> <param2> <param3>
param 1: entry number
param 2: IP address of
param 3: name of entry
Example:
mcast_set 1 225.0.0.2 test
2.2.1.2 Establishing Multicast connection with GANYMED 1002
A Multicast connection can be established with the command mcast_select. The command syntax of mcast_select is:
mcast_select <param1>:<param2>
param 1: entry number
param 2: priority
Example:
mcast_select 1 1 connects the first Multicast entry of GANYMED 1002 with the priority 1 (i.e. higher priority then other Multicast connections).
2.2.2 Disconnect Multicast connection of GANYMED 1002
The Multicast connection can be hung up with the command mcast_deselect 1.