Watch Brandi Carlile's Family-Filled 'Wherever Is Your Heart' Video

When Brandi Carlile hit the road late last year, she left her guitar cables at home.

The singer-songwriter’s Pin Drop Tour was revolutionary: an international tour by one of Americana’s leading ladies, with nary a P.A. speaker or microphone in sight. Backed by longtime partners Tim and Phil Hanseroth, Carlile played every show…