I have no multimedia audio controller... because I must have removed it or uninstalled it... how do I get my sound back

Any changes that either happened or that you perhaps made to your computer around the time that the problem started; particularly any software or hardware that you installed or setup.

*what OS do you have

*are there any yellow marks in device mgr?

-right click on My computer on desktop and click properties and then go to hardware tab and device mgr.

-if yellow mark next to sound device, right click o nit and choose uninstall and say OK

-close all open windows and then restart PC

-on restart, windows will try to install drivers for the sound card

*check sound when back in windows

As much info to try and pinpoint why sound does not work