5.1 Surround sound system does not work although the unit is supposed to have 5.1 capability.

[UZR987]

5.1 Surround sound system does not work on the computer although the unit is supposed to have 5.1 sound card and capability.

[Echo_Lake]

@UZR987
Thank you for posting on the HP Support Community.

I see that your experiencing issue with 5.1 audio does not work with the HP desktop. 
Don't worry as I'll be glad to help, however, to provide an accurate resolution, I need a few more details:

• When was the last time it worked fine?
• Have you made any hardware/software changes?
• Have you tried any troubleshooting steps?
• Have you tried updating the Audio driver?

While you respond to that, I recommend you to perform the following steps to isolate the issue and arrive at a fix:

Let's perform Windows Update and HP Support Assistant:

To check for updates now, select the Start button, and then go to Settings  > Update & security  > Windows Update, and select Check for updates.

Install updates from HP Support Assistant: Go to Download HP Support Assistant to install the tool.

1. To open HP Support Assistant, double-click the HP Support Assistant icon .
2. Click My devices in the top menu, and then click Updates in the My PC or My notebook pane.
3. Click Check for updates and messages to scan for new updates.
4. Review the list of updates. Updates with a yellow information icon are recommended. Updates with a blue information icon are optional.
5. Click the update name for a description, version number, and file size.
6. Select the box next to any updates you want to install, and then click Download and install.

Hope this helps! Keep me posted for further assistance.
If I have helped you resolve the issue, feel free to give me a virtual high-five by clicking the 'Thumbs Up' icon below, Followed by clicking on "Accept as solution" from the drop-down menu on the upper right corner, Thank you for posting in the HP Support Community.  Have a great day!