I’ve covered and attended Music Midtown since it started at a site where the Federal Reserve Bank now sits on 10th Street. Midtown was a different place in 1994, with more open space and fewer residents for big rock concerts to disturb. Now a denser, more attractive residential neighborhood surrounds the festival’s new home, Piedmont Park, and some wonder whether such an event is even suitable here. As the festival kicks off today, a neighborhood group details its complaints. A city official responds.