How do I tu on the Volume system icon without uninstalling my audio driver?

I have the Realtek HD Audio Manager installed (it came as part of the "Realtek High Definition Audio Driver") on my Windows 10 system, and this means that it replaces the default Windows volume control in the tray, as you can see here in this screenshot:

However, I don't really like this Realtek HD Audio Manager. I can't single-click on it to immediately change the volume like I can with the default Windows control. However, I don't really want to uninstall the driver itself because I've read others complain that without it the quality is degraded. Unfortunately it seems like the driver and the Audio Manager are coupled.

I tried using the Settings app to tu on the volume icon, but couldn't find a way. When I click on the "Off" toggle (below), it's totally non-responsive. How can I get the Windows volume tray icon back?

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