Resolving Feedback Problems in Elluminate Live!

Audio Feedback in Elluminate Live! is almost always caused by having more than one microphone and/or set of speakers operating at the same time. This usually happens in one of several scenarios:

  1. if more than one computer in the same room is logged in to Elluminate (such as in a lab or classroom setting). Elluminate automatically mutes the speakers on the computer with the active microphone, but can’t mute the speakers on the other computers (otherwise no one logged in on a remote computer could hear). Active microphone on one computer + speakers on another = feedback.
  2. if a meeting participant is not using external speakers and has activated his/her microphone while audio is coming from the external spekakers


Here are some ways to avoid feedback problems:

  • If possible, make sure that everyone who’s logged in to Elluminate in the same room is using a headset.
  • If you need to use external speakers rather than a headset (e.g. you’re presenting to a face-to-face class or conference, and want people who aren’t logged in to Elluminate to hear the conversation), you MUST mute the microphone and speakers (or turn down the volume all the way) on ALL the other computers. You can do that either using the normal Windows/Mac volume controls, or by using the audio sliders in Elluminate itself (this is the recommended procedure). If you’re using any kind of external speaker system, all presenters should speak into the microphone connected to the computer with the speakers. Any other configuration is likely to cause trouble.
  • If everyone is using a headset but you’re still getting feedback or poor audio quality (particularly low volume), Elluminate may be using a different microphone from the one you think it is. For example, many video cameras, including the Apple iSight and the Logitech “ball on a stick” camera, have built-in microphones. In addition, most current Macintosh computers (including CTER’s iMacs and iBooks) have yet another built-in microphone. To change the audio source, first go to Tools, then Audio Setup:



Next, make sure that the headset mic is selected rather than one of the others:



Special thanks to  “” for source information used in this post.


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