Opus 7 was founded by Ariel in 1988. Their members come from different walks of life and enjoy friendships while singing choral music of various styles. The group has many accomplishiments: They have toured Europe: Italy, France, Switzerland, Germany, England, and Holland; performed with the Glendale Symphony; and sung at the Hollywood Bowl, Santa Barbara Mission, the Ebel Theatre, and the Dorothy Chandler Pavillion in Los Angeles.

Opus 7 are:

Evelyn Gaymeier, Emilce Karpiuk, Silvia Jourdan, Mirta Leiss-Gasparri, Alma Meza, Nancy Milesis


Veronica Ayvazian, Miriam Burbaj, Helene Quintana, Gisela Riffel


Edwin Bravatti, Sergio Heffel, Edrei Wittenmore, Raul Zanatta


Leonardo Ferrando, Sergio Jourdan, Ronald Karpiuk, Alan Riffel, Hugo Riffel-Dalinger, Christian Solis