After forming at Brown University in 1986, television appearances in the '90s, including a regular gig as the house band for PBS' Where in the World Is Carmen Sandiego?, gave Rockapella the platform to become a leader in the evolution of a cappella. They earned this recognition by texturing their rich, five-part vocals with elements not only of doo wop, but rock, jazz, contemporary R&B, and pop, for a full-band sound. They issued their first album in 1992 and, through periodic lineup changes, continued with a consistent stream of releases through 2004. During that time, they a...