Keyboard Shortcut for Sound System Preferences

Hi everyone -

One of my favorite keyboard shortcuts on the Mac is "option + volume up" (or volume down) keys. This automatically opens system preferences and takes you to the sound preferences. I must use this at least a dozen times a day.

I recently got a new (non Apple) keyboard, and while it does have option and volume keys, the above shortcut does not work. Does anyone know what key commands the computer receives to cause the sound preferences to open?

I like to maybe use one of the softkeys on the keyboard to recreate this shortcut. Thanks! I've called Logitech and opened a case with a product specialist at Apple, but I figured I'd try here too.

Thanks!