EB321HQU Monitor - How to Get Audio Through 3.5mm TRRS Jack

n_sweep · August 2021

I have purchased a new EB321HQU monitor. It is plugged into my laptop via HDMI, but my audio is going through an external mixer. I cannot seem to get audio to play through the monitor's built in speakers via the 3.5mm jack. Am I missing something?

Balatekie · August 2021

Hi @n_sweep,

First, please check if this specific model has an internal speaker.

Later, verify that HDMI audio is your default playback device selected on the Windows* Sound Control Panel

From the Windows desktop taskbar, right-click on the speaker icon to view the menu.

The Windows Sound Control Panel will open.

The Playback tab lists the audio playback devices for your computer.

Check if HDMI Audio is set as the Default Device. If not set as the default device, right-click on the device and select Set as Default Device.

Click OK to save changes.

Regards,
Balatekie

Balatekie · August 2021

Hi @n_sweep,

First, please check if this specific model has an internal speaker.

Later, verify that HDMI audio is your default playback device selected on the Windows* Sound Control Panel

From the Windows desktop taskbar, right-click on the speaker icon to view the menu.

The Windows Sound Control Panel will open.

The Playback tab lists the audio playback devices for your computer.

Check if HDMI Audio is set as the Default Device. If not set as the default device, right-click on the device and select Set as Default Device.

Click OK to save changes.

Regards,
Balatekie

n_sweep · August 2021

Hi @Balatekie, thanks for your response. The HDMI audio works perfect fine, however I am trying to get audio through the 3.5mm input rather than the HDMI connection.

billsey · September 2021

The 3.5mm jack may be an audio OUT jack, not audio IN. That would allow you to send the HDMI audio to external speakers.

n_sweep · September 2021

Hi @billsey, this model has both an audio out (green ring) and an audio in (blue ring). When I plug a cable into the audio in it does cut off my HDMI audio, as it should, but the audio from the 3.5mm line in does not play through the speakers.

Joe9844 · September 2021

Acer monitors are usually designed to accept 3.5mm audio in ONLY for video inputs (such as VGA and DVI) that didn't have audio signal.

The monitor will not accept 3.5mm audio in when you use HDMI cable when that HDMI already includes audio signal.

n_sweep · September 2021

Thanks for that explanation @Joe9844, any idea why the the input jack is designed to cut the HDMI audio when the 3.5mm jack is plugged in while also refusing the play the audio through that jack?

Joe9844 · September 2021

You got my explanation backwards.

Acer monitors are usually designed to ignore any 3.5mm audio input cable when it is using HDMI video input cable.

Since you also directed your laptop to use 3.5mm audio line out to your external mixer --- so your HDMI video cable doesn't carry any audio signal anymore. 1+1 = your monitor doesn't have any sound.

n_sweep · September 2021

@Joe9844 I see what you mean. My pc's audio output is set to the mixer via it's USB connection. I'm running the mixer headphone-out to the monitor's audio in, not the pc. The mixer's headphone out is confirmed live, but the monitor doesn't push the audio signal.

Additionally, if the pc is set to HDMI audio, plugging the 3.5mm into the audio in cuts the HDMI off (as expected), however there is no situation in which the monitor plays audio sent through the audio input.