Santa Barbara-based Sonos, a developer of a multi-room wireless music system, said Wednesday that it has added three new retail chains. According to Sonos, ABT Electronics, Ken Crane's, and Vann's will carry the firm's Sonos Digital Music System. ABT Electronics is a regional retail in Chicago; Ken Crane's serves Southern California, and Vann's is located in Montana. Sonos develops a user-friendly, digital music system that allows consumers to stream music from a PC or the Internet to multiple points in a house.