"mixed choir" is correct and can be used in written English.
For example, "The performance featured a stunning mixed choir singing a capella."
In "Epitafium" (1958), for mixed choir and instruments, he began experimenting with the spatial placement of his performing forces.
The sound he drew from his 22-voice mixed choir was lush, flexible and beautifully unified, and it was supported by an expert period instrument band.
Dvořák, "Rusalka"; Renée Fleming, Ben Heppner, Dolora Zajick, Franz Hawlata, Charles Mackerras conducting the Czech Philharmonic and Kühn Mixed Choir (Decca).
Unlike St. Thomas's version, which uses a choir of men and boys, Trinity uses a mixed choir of adult, professional singers and draws its soloist from the choir's ranks.
The two-hour mega-cantata comprises 11 French horns, four harps, eight flutes – basically imagine a standard symphony orchestra and double it, then add three male choruses, a mixed choir and six vocal soloists.
Over the course of two evenings and a morning, I heard a huge variety of instruments and ensembles, from a solo piano, to a string trio, to a new piece for wind, brass, mixed choir and tape.
A listener can hear wildly differing interpretations of this oratorio every Christmas, from the thundering power of large modern orchestras, with hundred-strong mixed choirs, to lithe and transparent renditions, like that conducted by John Scott on Tuesday.
Requiring two huge mixed choirs; a large children's choir; eight vocal soloists; an organ, celesta, grand piano and harmonium onstage; a brass choir offstage; and, of course, a gigantic symphony orchestra, there is simply nothing in music quite like it.
From time to time he has tried to transfer these talents to bigger, heavier old-school formats, the latest example being "Ecce Cor Meum," a kind of oratorio for mixed choirs, soprano and orchestra written in memory of his first wife, Linda, and played at Carnegie Hall on Tuesday night.
In 1997 it was released on CD, in a recording made in Messiaskirken in Charlottenlund by the soloists Ingibjörg Gudjonsdottir, soprano, Elisabeth Halling, alto, Gert Henning-Jensen, tenor, Christian Christiansen, bass, two mixed choirs, two children's choirs, brass band, organ and percussion, conducted by Steen Lindholm.
But there is a purity in the sound of trained boy sopranos that a mixed adult choir cannot match.
