Audio Issues

Sound is not coming out of the classroom speakers?

Image of push button media link controller In a classroom with a MediaLink push button controller:
Be sure that the volume knob is turned up, showing at least 4 lights illuminated to the left of the knob.
Image of touch panel controller In a classroom with a Touch Panel controller:
Be sure that the volume slider is at least 3/4 of the way up.
Also try muting / un-muting by pressing the mute button.

How to change audio output settings on your computer

In most cases, when connected via the Laptop HDMI or Laptop USB-C cable, your laptop will automatically output audio to the AV system's speakers. However, you may occasionally have to change these settings manually.

  • Apple audio output settings (Mac)  

    Step 1:
    Click on the Apple logo in the upper left corner of your desktop and choose System Settings from the drop down menu.

    Image of apple system settings location

    Step 2:
    Click on the Sound icon in the left hand menu.
    In the Output tab section shown below, select the option that is not your Macbook Speakers or Headphones. It will typically be named Extron HDMI or HDMI.

    Image apple audio settings with sound icon and output tab highlighted in green

    If the output choice is not available, try unplugging your laptop from the AV system, and then plugging it back in.  Additionally, restarting your laptop may help to resolve the issue.

  • PC audio output settings (Windows 11)

    Step 1:
    Access your laptop output options by pressing the Windows Key, Ctrl Key and the V Key at the same time on your keyboard.Image of pc keyboard with the Windows Key, Ctrl Key and the V Key highlighted

    Step 2:
    In the menu that pops up, select the option that is not your laptop speakers or headphones.  It will typically be named Extron HDMI or HDMI. 

    Image of PC audio output settings pop up menu

    If the output choice is not available, try unplugging your laptop from the AV system, and then plugging it back in.  Additionally, restarting your laptop may help to resolve the issue.

  • PC audio output settings (Windows 10 or older)
    Step 1:
    Click on the speaker icon in the lower right corner of your desktop.

    Image of windows 10 speaker icon location with speaker icon highlighted

    Step 2:
    Click on the ⌄ icon to expand the audio output menu.

    Image of windows 10 with arrow icon location highlighted

    Step 3:
    Select the option that is not your laptop speakers or headphones.
    It will typically be named Extron HDMI or HDMI.

    Image of windows 10 audio output selection with room output highlighted

    If the output choice is not available, try unplugging your laptop from the AV system, and then plugging it back in.  Additionally, restarting your laptop may help to resolve the issue.


If the tips above do not correct the issue, please call our AV Helpline 607-777-4757 or fill out a Service Request using the button on the right side of this page.