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Introduction
Audio Talkback
Makito X User’s Guide, v2.0, Issue 01 39
Audio Talkback
The Audio Talkback feature allows two-way audio communication using the Makito X
encoder’s audio output to function like an audio decoder. Audio talkback enables end users
monitoring a streaming session to “talk back” to individuals at the video source. The
talkback audio stream is output via a speaker or headphones connected to the encoder. For
example, students at remote classroom locations can ask their teacher questions, or a chief
surgeon observing a surgery can collaborate.
The audio talkback feature uses the InStream software player application or the Makito X
decoder (release 1.2 and later) to send the talkback audio to the Makito X. The talkback is
played out of the encoder’s 8-pin Mini-DIN connector (see
“Analog Audio Interface” on
page 32).
The following picture illustrates a sample signal path from the audio source through the
Makito X’s audio output when using the talkback feature.
Figure 1-24 Audio Talkback Signal Path
There is no audio mixer on the Makito X, so the talkback feature is “First-In/First Served”,
meaning that only one user can use the return audio channel at a time. The InStream player
application 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. This
prevents the user from accidentally locking and not releasing the channel.
The audio is only sent to the source video encoder; it is not distributed to other viewers of
the stream.
The Talkback network service may be stopped or started from the Web interface (Services
page, see
“Enabling and Disabling Network Services” on page 186) or using the service
command.
CLI commands are used to enable and disable reception of talkback audio, set the talkback
volume, clear talkback statistics, and display talkback information. For details, see
“talk-
back” on page 349 (CLI). Talkback audio is not configurable through SNMP in the current
release.