On Wikipedia https://en.wikipedia.org/wiki/Tölzer_Knabenchor
Alternative Spellings Tölzer Boys Choir
Creation 1956
City Bad Tölz, Germany
Country Germany
Links Bach Cantatas

In the realm of baroque music in particular, the "Tölzer" made a significant contribution to the change in musical (historically informed) performance practice. Tölz boys have been entrusted with the boy solo parts in Europe's leading opera houses. The choir is in great demand in oratorios and symphonic works performed by renowned orchestras and famous conductors. Eminent artists such as Carl Orff, August Everding, Hans Werner Henze, Leonard Bernstein, Gustav Leonhardt, Nikolaus Harnoncourt, and Claudio Abbado count among the choir's supporters. Herbert von Karajan once referred to the Tölzer as "one of the best choirs in the world" and chose this choir for his performances and recordings with the Berlin Philharmonic and the Salzburg Festival whenever a boy choir was needed. wikipedia