Multicast RTP 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 main difference between RTP and UDP is described in Unicast RTP.
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 RTP connections can be established between:
| • | CENTAURI’s, MERK’s II and GANYMED’s 1102: can be used as Multicast Sender and Multicast Receiver.For this the new RTP protocol implementation of is used. |
| • |  and other decoders (like Winamp 5.05): is used as Multicast Sender. |
| • | and GANYMED 1002 |
1. Multicast RTP connection to other CENTAURI, MERKII and GANYMED 1102
New RTP protocol implementation is used.
1.1 Codec Settings of Multicast sender
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.
1.2 Codec Settings of Multicast receiver
Configure the codec settings via menu item Settings/Codec:
| • | Encoder dependency: Remote |
| • | Decoder dependency: Remote |
1.3. Establish Connection (Multicast Sender and Receiver)
Click the CONNECT button to open the Connect-dialog:
| • | Select interface to IP |
| • | Select RTP |
| • | 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 RTP connection to other decoders
Old RTP protocol implementation is used provided system software <= 2.1.0.46.
2.1 Codec Settings of Multicast sender
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.
2.2. Establish Connection (Multicast Sender)
Click the CONNECT button to open the Connect-dialog:
| • | Select interface to IP |
| • | Select RTP |
| • | Type in the Multicast IP-address preceded with an ‘r’ Note: Since system software version 2.1.0.47 no more ‘r’ is necessary Note 2: A special port can be selected by the optional suffix ‘:<port number>’ (e.g. r225.0.0.2:5004) |
| • | Click the OK-button to establish connection |
2.3 Establish Connection (other decoder)
Please consult the manual of the referring decoder for this.
Here the steps for Winamp 5.05 (just works with MPEGL2 and MPEGL3)
| • | Ensure that the latest ‘in_rtp.dll’ Plug in is installed |
| • | Step to menu item <File/Play URL..> |
| • | Type in: rtp://<Multicast IP-address>:<port number> Example: rtp://225.0.0.2:5004 |
| • | Click the Open-button to establish connection |