TANDBERG Codec C90 and Profiles using C90
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Stereo
Stereo in point to point call
Receive stereo
If the other participant sends stereo the codec will receive stereo. To play stereo the local output still needs to be configured correctly (see local stereo circuit example).
Transmit stereo
In order to send stereo, the other participant must be able to receive stereo. Also, the local input with the stereo signal must be configured correctly (see local stereo circuit example). In addition, there must be a signal on one of the connectors connected to the local input.
Stereo in Multisite
•The TANDBERG Codec C90 sends and receives stereo signals in multisite.
•The TANDBERG Codec C60/C40 will only send and receive mono signals in multisite.
Examples of local stereo configuration
When you want to record a stereo presentation the audio system can be configured as shown in the illustration.
Local stereo circuit example (from the Audio Console)
Presentation
The local input has two connectors: Line 1 and Line 2. When these two connectors are mixed together as a stereo signal, Line 1 is the left channel and Line 2 is the right channel.
Recorder
The local output has two connectors: Line 3 and Line 4. The local output pans the stereo signal according to the channel configuration of the connectors. Line 3 receives the left channel and Line 4 receives the right channel.
In the example the local input has two connectors: Line 1 and Line
2.When these two connectors are mixed together as a stereo signal, Line 1 is the left channel and Line 2 is the right channel.
And the local output has two connectors: Line 3 and Line 4. The local output pans the stereo signal according to the channel configuration of the connectors. Line 3 receives the left channel and Line 4 receives the right channel.
Local stereo circuit example with API commands
The graphic gives a picture of how to configure the audio system for recording a stereo presentation. You can do the same from the API. The belonging xCommands and xConfigurations are listed below.
In this example there is a local input with input id 5 and a local output with output id 6. Both are set to stereo by the channels parameter.
•xCommand Audio LocalInput Update Inputid:5 Name:”Presentation” MixerMode:Fixed AGC:On Mute:Off Channels:2
•xCommand Audio LocalOutput Update Outputid:6 Name:”Recorder” Loudspeaker:No Channels:2
•xConfiguration Audio Input Line 1 Channel: Left
•xConfiguration Audio Input Line 2 Channel: Right
•xConfiguration Audio Output Line 3 Channel: Left
•xConfiguration Audio Output Line 4 Channel: Right
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