By Don Heckman A group of world class singers appearing on the same stage can often be a recipe for rampant egomania.  But not when the singers – Morgan Ames, Julie Delgado, Deborah Dietrich, Shelby Flint, Sheri Izzard and Michael Mishaw — are the members of the vocal ensemble Inner Voices.  The performance of this… Read More Live Music: Inner Voices at Vitello’s