“Barenaked Voices: Fifth Annual Emory Student A Cappella Celebration,” Eric Nelson, host, Apr. 12, 8 p.m., donations accepted at the door (proceeds benefit Emory University Student Counseling Center),Emerson Concert Hall, Schwartz Center, 1700 N. Decatur Rd., Emory University, Atlanta, Ga, 30322, 404-727-5050, www.arts.emory.edu. A showcase of student- and faculty-led a cappella groups, including Aural Pleasure, Voices of Inner Strength, No Strings Attached, Emory University Chorus, Emory University Concert Choir, The Gathering, Dooley Noted, and Ahana A Cappella.