Sigma Alpha Iota (ΣΑΙ) is an international music fraternity. Formed to "uphold the highest standards of music" and "to further the development of music in America and throughout the world", it continues to provide musical and educational resources to its members and the general public. Sigma Alpha Iota operates its own national philanthropy, Sigma Alpha Iota Philanthropies, Inc. Sigma Alpha Iota is a member of the National Interfraternity Music Council and the Professional Fraternity Association.

Jessye Mae Norman was an American opera singer and recitalist. She was able to perform dramatic soprano roles, but did not limit herself to that voice type. A commanding presence on operatic, concert and recital stages, Norman was associated with roles including Beethoven's Leonore, Wagner's Sieglinde and Kundry, Berlioz's Cassandre and Didon, and Bartók's Judith. The New York Times music critic Edward Rothstein described her voice as a "grand mansion of sound", and wrote that "it has enormous dimensions, reaching backward and upward. It opens onto unexpected vistas. It contains sunlit rooms, narrow passageways, cavernous halls."