Vocal Spectrum was created in 2003.
Vocal Performances was created in 1981.
Vocal Point was created in 1991.
Academy of Vocal Arts was created in 1934.
Quintessential Vocal Ensemble was created in 1993.
Artists' Vocal Ensemble was created in 2004.
Ensemble Vocal Katimavik was created in 1970.
The Scholars - Vocal Group - was created in 1968.
Emersons - vocal group - was created in 1957.
Cantus - vocal ensemble - was created in 1995.
Spectrum Aircraft was created in 1983.
Guildford Spectrum was created in 1993.
Spectrum Technologies was created in 1987.