Classical reviews: Komitas and Piazzolla

The Latvian Radio Choir performs a new arrangement of the Armenian composer's liturgy for mixed voices, while the Quinteto Astor Piazzolla perform some works that will be refreshingly unfamiliar. By Michael Church

The Argentine composer Astor Piazzolla was forever pushing out the boundaries of his art form (AFP via Getty Images)

Komitas: Divine Liturgy

Latvian Radio Choir, conducted by Sigvards Klava

(Delos DE 3590)