Charlotte Ann Martin is an American singer-songwriter and voice coach, who performs predominantly on the piano. She has written several studio albums, two of which have received mainstream commercial releases, 2004's On Your Shore and 2006's Stromata. In 2009, she released an instrumental piano album titled Piano Trees before releasing her new studio album Dancing On Needles on February 1, 2011. On February 25, 2014, she released a new studio album, Water Breaks Stone.

Ken Andrews is an American musician, singer-songwriter, and record producer. Andrews was born in Seattle, Washington, and attended film school in Los Angeles before his band Failure received a record deal from Slash Records.