Soprano Jennifer Bird has showcased her powerful pipes throughout Europe and the United States in more than 50 roles in opera, operetta and musical theater. Now, the singer shares her skills in a Sunday master class at Spotlight Vermont along with Bill Reed of South Burlington’s Bill Reed Voice Studio. An associate professor of voice at the University of Colorado Boulder, Bird schools developing vocalists in Broadway singing styles and classical art songs. Those looking for an encore performance can hear the songstress, accompanied by pianist Alexandra Nguyen, in an inspiring concert of songs by Benjamin Britten, Arnold Schoenberg, Kurt Weill and William Bolcom on Tuesday at Saint Michael’s College.