2012 Chicago Harmony Sweepstakes A Cappella Festival
Vocal Spectrum Group History
Masterpiecequartet - PR Kit
As Long as I'm Singin' (TTBB) (arr. Wright) - Download - Barbershop Harmony Society
File:Spectrum Vocal Band.jpg - Wikimedia Commons
An evening of extraordinary a cappella singing
Singerprints Spectrum Vocal Band
Vocal Spectrum: albums, songs, playlists
Photos - THE PRETZEL CITY CHORUS