the Mala Waldron Quartet (aka Soulful Sound) is a group of internationally acclaimed jazz virtuosos headed by jazz vocalist/pianist/composer Waldron. The group will make a rare local appearance in Westchester Collaborative Theater (WCT)’s Music in the Box Series. Waldron will perform a sophisticated blend of soulful jazz together with Steve Salerno on guitar, Michael T.A. Thompson on drums, and Marcus Mclaurine on bass at WCT’s black box performance space, 23 Water St. in Ossining.