IntroductionAudio TalkbackMakito X User’s Guide, v2.0, Issue 01 39Audio TalkbackThe Audio Talkback feature allows two-way audio communication using the Makito Xencoder’s audio output to function like an audio decoder. Audio talkback enables end usersmonitoring a streaming session to “talk back” to individuals at the video source. Thetalkback audio stream is output via a speaker or headphones connected to the encoder. Forexample, students at remote classroom locations can ask their teacher questions, or a chiefsurgeon observing a surgery can collaborate.The audio talkback feature uses the InStream software player application or the Makito Xdecoder (release 1.2 and later) to send the talkback audio to the Makito X. The talkback isplayed out of the encoder’s 8-pin Mini-DIN connector (see “Analog Audio Interface” onpage 32).The following picture illustrates a sample signal path from the audio source through theMakito X’s audio output when using the talkback feature.Figure 1-24 Audio Talkback Signal PathThere 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 playerapplication provides “push-to-talk” functionality, which requires that the user push a buttonto transmit audio. The user must keep pushing the button to use the talkback channel. Thisprevents 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 ofthe stream.The Talkback network service may be stopped or started from the Web interface (Servicespage, see “Enabling and Disabling Network Services” on page 186) or using the servicecommand.CLI commands are used to enable and disable reception of talkback audio, set the talkbackvolume, 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 currentrelease.
