...a young orchestra of the Oper Burg Gars under the title "Klangvereinigung Wien" provides an equally ambitious foundation as the choir of the Oper Burg Gars (choir master Roger Diaz-Cajamarca)... (Source in German)

...in addition to the two aristocratic protagonists, it was the choir singers, both men and women, who were vocally convincing. Under the conduct of Roger Diaz-Cajamarca, who himself performed the first priest, the voices harmonized perfectly... (Source in German)

...the young Colombian conductor Roger Díaz-Cajamarca impressed with the "mdw Chamber Orchestra" of the University of Music Vienna both with the Gustav Holst "St. Paul Suite" and with dances from Mozart's pen... (Source in German)