Check to see if your audio is set to stereo. I have had issues with some games where the sound is like crap. You have to tweak the settings in order to get them to sound good. A lot depends on where the audio source is coming from. You tube played fine but 2 games I have to play with to get it to work.
Just go to Start > Control Panel > Hardware and Sound > Sound > Manage audio devices
Select the “Playback” tab and choose “Speakers”, then click on “Configure” and select “Stereo”, “next”, “front left and right” to start.
You might check to see if the enhanced audio is checked. don’t remember where that setting is off the top of my head.