I am running Yokohama all season tires, but the road noise seems to be getting louder and louder. at low speeds (20mph), it seems rhythmic, and the faster I go, the sound is more of a droning whine, not real high pitched though.

Where to begin? Rotate tires, any front end parts I can inspect?

 

Had a guy take a look at the tires and right away said the tread was bad. I ran my hand across the tread and could tell it was raised unevenly. Will rotating help, alignment?