United in marriage and music, Susan Tedeschi and Derek Trucks lead the sprawling, improvising, steeped-in-roots music Tedeschi Trucks Band. The twelve-piece group includes a three-piece horn section and trio of backup vocalists. And reflecting the 15 years Trucks spent in the Allman Brothers Band alongside his late uncle, Butch Trucks, the Tedeschi-Trucks road show features two drummer-percussionists.