No amps or microphones are invited to Brandi Carlile’s fall excursion, which is fittingly named the “Pin Drop Tour.” The intimate, “ultra-unplugged” road trip is slotted Oct. 1-15 at a handful of historic, small U.S. theaters. But don’t let the title of the journey fool you into thinking this is going to be an uber-quiet … More Brandi Carlile’s ‘Pin Drop Tour’