MIAMI/SOUTH FLORIDA Between the Winter Music Conference, Miami Music Week, and the three-day, mega music festival known as Ultra, late March tends to turn Miami-Dade County into a reverberating playground of sounds, with global DJs and party promoters even more of a presence here than they usually are. Now in its 14th year, Ultra Music Festival will kick off its March 23 to 25 run with a new home—or more fittingly, a homecoming. From 2001 to 2005, Ultra was hosted in downtown Miami’s Bayfront Park before relocating up the street to Bicentennial Park, where it remained until 2011. Due to the festival’s capacity outgrowing that venue—200,000 attendees are expected this weekend—Ultra moved back to Bayfront Park this year.