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Audio Talkback

The Audio Talkback network service allows users to stream a mono channel of audio back to a Makito X encoder over a reliable LAN or WAN. Audio talkback uses the decoder’s audio input to enable end users monitoring a streaming session to “talk back” to individuals at the encoder. For example, talkback enables students at remote classroom locations to ask their teacher questions, or a chief surgeon observing a surgery to collaborate.

The talkback audio stream is input via a microphone connected to the decoder’s 8-pin MiniDIN connector (see Analog Audio Interface).

The following picture illustrates a sample signal path from the audio source through the Makito X’s audio input when using the talkback feature.

Audio Talkback Signal Path (using Makito X Decoder)

Administrators can enable or disable audio talkback on the decoder and specify the UDP port to transmit (i.e., the destination port used by the encoder). They can also select the talkback activation mode (either Push Button or Toggle Switch) from the Web interface.

  • Push Button provides “push-to-talk” functionality, which requires that the user push a button to transmit audio. The user must keep pushing the button to use the talkback channel.
  • The Toggle Switch stays active until the user clicks the button again.

The Talkback network service may be enabled and disabled from the Web interface (Services page, see Enabling and Disabling Network Services) or using the service CLI command.


For Talkback to start automatically when the unit is rebooted, a default preset should be created while talkback is active and the button mode is set to Toggle Switch.

Once the Talkback service is enabled, a user simply selects the stream and presses the Talkback button from the Web Interface (Streams page) to start streaming the audio from the microphone to the encoder of that stream. For details, see Starting and Stopping Audio Talkback.

CLI commands may be used to start or stop transmission of talkback audio, specify the talkback port, clear talkback statistics, and display talkback information. For details, see “talkback” (CLI). Talkback audio is not configurable through SNMP.

The audio is only sent to the source video encoder; it is not distributed to other viewers of the stream.


Audio talkback is uncompressed audio (using approximately 350 kbps of network bandwidth).
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