The choir began its activities in 1988 in the city of Treinta y Tres, rehearsing for the first time on August 3; its first public performance took place on October 21st   that same
year. From its inception until December 2009 its Director was Maestro Alejandro Guillermo, and at present the direction of Master Malena Rivarola, being assisted since 1994 by teacher Maria Onima Lucas. Between the years 2004 and 2006 the group has also counted with the collaboration of Assistant Marta Pereira.
Every year this choir receives the invitation of different local and regional institutions
to participate in several events such as seminars, anniversaries, and some cultural events. These activities create a fluid interchange with almost every public and private institution in the city of Treinta y Tres and surrounding area.
In its 20 years of life the choir has held over 500 performances in Uruguay as well as abroad. Some of these most important events are listed below :

• Several performances in Montevideo-Uruguay (Institute Juan XXIII, University of the Republic, National Parliament, Catholic University, etc...)
• In 1993, the choir promoted and actively participated in the performance of a  complete opera held for the first time in the City of Treinta y Tres. The chosen piece for this occasion was  “Die Zaüberflöte"  by W. A. Mozart.
• International Festival of Choirs “CANTAPUEBLO 94” held in the city of Mendoza, Argentina.
• Continuous participation in the “Uruguayan Confederation of Eastern Choirs” festivals, organized by the Ministry of Education and Culture.
• In November 1997 the Choir officially presents the Treinta y Tres Anthem in an act carried out at the city´s Culture House, with the presence of national authorities.
• Since its first year the choir closes its annual activity offering  a Christmas concert, including some carols and spiritual songs from the most diverse regions and times. This event has become a tradition in our “olimareñas” (nickname given to the people who born in Treinta y Tres) Christmases.
• In the year of 1999, Pro-Música participated in the First International Festival of Choirs of Idaho (USA). While there, the choir also spent 6 days visiting Salt Lake City, having the opportunity of participating in various concerts, and so interchanging experiences with some other conductors, organists, and members of the famous Mormon Tabernacle´s Choir.
• On July 11, 2000 the choir  received  the excellent Northwest Girlchoir, a female choir from the city of Seattle - USA, sharing a concert and a whole day together.
• In the year of 2001 it organized the visit and concerts given by two European chorales :  the “Wiener Vokalensemble” from Vienna – Austria,  and the chorale “Verge del Cami”  from Catalonia - Spain.
• In 2004 Pro-Música also received a choir from Poland, the Polytechnical School Choir from Chestokowa.
• At the beginning of 2005, a long yearned project was finally achieved : the launching of its first CD, entitled "Cantares de Treinta y Tres", counting with the support of the city´s  Municipal Government. This CD contains the folkloric and
  academic work of musicians born all of them in Treinta y Tres.
• In May of 2006 the choir received another excellent american choir, the Heinz Chapel Choir from the University of Pittsburgh, USA.

URUGUAYAN CHOIRS THAT VISITED US AND WE REMEMBER WITH AFFECTION

Ars Viva  (Montevideo)
Coro Lírico de Punta del Este (Maldonado)
Coro de Niños de la Escuela de la Presentación (José Pedro Varela, Lavalleja)
Coro Municipal de Paso de los Toros (Tacuarembo)
Coro de la Iglesia Adventista del Uruguay
Conjunto Coral de Adultos del Instituto Crandon  (Montevideo)
Coro Popular de Rafael Peraza (San José)
Coro del Instituto Anglo  (Montevideo)
Coro Municipal de Aiguá (Maldonado)
Asociación Coral “Las Piedras” (Canelones)
Asociación Coral Lascanense “Dr. Roberto Introini”  (Lascano, Rocha)
Coro Municipal de Maldonado
Coro del Conservatorio Municipal de Rocha
Coro Municipal de Minas (Lavalleja)
Coro de Amigos del Colegio Alemán (Montevideo)
Camerata Vocal (Montevideo)
Grupo Vocal  “Cantares 10”  de Minas (Lavalleja)
Movimiento Coral de Cerro Largo
Grupo Coral “El Ceibal”  (Montevideo)
Coro Municipal de La Paloma (Rocha)
Coro del Colegio de Contadores del Uruguay
Coro Maysupí  de José Pedro Varela (Lavalleja)
Coro Municipal Popular “Gabino Méndez Blanco”  de Castillos (Rocha)