mc²56 - Stream Parameters
The following parameters appear when you select an existing sender or receiver followed by the Parameters button.
A subset of these can be revealed in the Advanced Settings area when you create a new sender or receiver.
Sender Parameters
- Label
The Label identifies the stream to other network users. It cannot be edited once the stream is created.
- Audio Channels
This value sets the number of audio channels to be encoded.
- Packet Time
- Codec
This field selects the encoding method used for the digital audio. Use the drop-down menu to choose an option:
- L16 = 16-bit Linear PCM
- L24 = 24-bit Linear PCM
- AM824 = 24-bit Linear PCM + 8-bit metadata, a non-standard format commonly used in AES/EBU.
- Protection
- Network Port(s)
This field determines which interface, or interfaces, will be used to transmit the stream to the network. To create SMPTE ST2022-7 compatible streams, you should choose Dual Redundant to activate both interfaces. If redundant streaming is not required, then you can choose to issue the stream from either the Primary or Secondary interface. In this instance, the multicast address fields update accordingly
- Primary / Seconday Status
Here you will see the status of the primary and secondary connections.
- Primary / Secondary Multicast IP Address & Source IP Address
Here you will see the multicast IP addresses for each interface (Primary and Secondary).
- Destination UDP port
- RTP Payload Type
Describes the format of the transported content. The default value = 98.
- TTL (Time to Leave)
The TTL value can be used to prevent data packets from circulating indefinitely. The default value = 16.
You may need to increase the value if your network includes several Layer 3 network switches (Gateways).
- External Tieline
Use this option to create a external tie-line (to publish audio to the network).
Once the sender is created, it will have an SDP that can be copied and pasted (into the SDP Data for the receiving device).
To copy the SDP, select the sender (in the Senders list) and select SDP Data. Then use Copy to Clipboard to copy the contents.
Receiver Parameters
- Label
The Label identifies the receiver to other network users. It cannot be edited once the receiver is created.
- Audio Channels
This value sets the number of audio channels to be decoded.
- Packet Time
- Codec
This field selects the decoding method used for the digital audio. Use the drop-down menu to choose an option:
- L16 = 16-bit Linear PCM
- L24 = 24-bit Linear PCM
- AM824 = 24-bit Linear PCM + 8-bit metadata, a non-standard format commonly used in AES/EBU.
- Protection
- Network Port(s)
This field determines which interface, or interfaces, will be used to receive the stream from the network.
If the stream's SDP information contains two SMPTE ST2022-7 compatible streams, then you can receive the stream redundantly by selecting the Dual Redundant option (default). You may also choose to receive it non-redundantly by choosing either Primary or Secondary. If the stream's SDP is not SMPTE ST2022-7 compatible, then the field is set to Primary (by default). In this instance, you can change the receiver port to Secondary if needed.
- Primary / Seconday Status
Here you will see the status of the primary and secondary connections.
- Primary / Secondary Multicast IP Address & Source IP Address
Here you will see the multicast IP addresses for each interface (Primary and Secondary).
- Destination UDP port
- RTP Payload Type
Describes the format of the transported content. The default value = 98.
- Syntonized
By default this option is disabled, which means that the receiver is running in synchronized mode. Select the option to enable syntonized mode, which means that the stream will be free running.
Syntonized mode should be used if the clock signal is missing from the SDP information, or if you have a different clock source selected at the sender and receiver.
Syntonized mode should always be enabled for connections between Lawo audio and V__line devices. |
- Delay relative to source timestamp (samples)
- External Tieline
Use this option to create a external tie-line receiver.
In this instance, you will need to paste in the SDP data of the stream you wish to receive.
This can be done by selecting the receiver (in the Receivers list) and selecting SDP Data. Paste in the SDP (copied from the receiver) and select Write SDP data to save.
Stream Statuses
The status of each stream is displayed in the Stream Parameter windows.
If a stream is configured for redundancy, then you will see the status of both paths: primary and secondary.
The table below describes how to interpret each message.
# | Status | Description |
0 | Undefined | The streamer has received a request to create the stream, but no further action has been taken. |
1 | Invalid | One or more of the stream parameters are invalid (i.e. wrong sample rate, invalid streaming interface, etc.). Please check the "error"-Object for further information. |
2 | Initializing | The streamer is initializing the stream (i.e. creating all internal structures, writing FPGA registers, etc.). |
3 | Inactive | The stream is completely initialized but not started in the FPGA (i.e. it has been actively stopped or is waiting for track mapping). |
4 | Error | There are one or more errors on a running stream (i.e. no data, wrong RTP-Payload, etc.). Please check the "error"-Object for further information. |
5 | Waiting | Applies only to RX-streams. The stream has been successfully setup and is running, but has not yet received any data. |
6 | Active | The stream has been successfully setup and is running. |