SP3 volume buttons not working

[EMitchell]

I have a new SP3, and have been figuring things out little by little. One problem I've got is adjusting the volume. I can use the volume icon in the lower RH corner of the toolbar. But the volume buttons on the left side of the Surface itself don't affect the volume at all. I also only know about the volume mute key on the keyboard, are there key strokes for controlling the volume? Anyone else have volume problems?