When I suggested doing a list of great a cappella performances, my editor expressed polite repulsion. That makes sense; “a cappella” for a lot of people means either reverent plainchant or glee clubs ...

Just four short years ago, a twenty-something sextet, by the name of Committed, stole the show and votes when they took home the coveted title of Season 2’s winners of NBC’s hit show, “The Sing Off.” ...

Few people were aware of the 1994 single “Insomniac” by the rock duo Billy Pilgrim, and it quickly sank into obscurity. But a cappella groups can’t stop singing it. We set out to find an explanation.

A cappella harmonies resounded through the ballroom of Banskia on Nov. 17, sung by MAiken Music, a seven-woman singing group. The first half of their one-hour concert was a selection of vocal ...