On Kelli Scarr’s 2010 album “Piece,” one hears a wispy, ethereal voice backed by dreamy instruments. Her name doesn’t just rhyme with Mazzy Star, her music does, too. Except, well, not really.
The space between a studio album and long months touring can grow and change a music, and intimate settings such as Muddy Waters can replace studio experimentation with a vibrant urgency.