only ones with choirs, not with solo singers..
Piano Concerto No. 8 by Daniel Steibelt
Alexander Plinkovsky - Concerto for piano, banjo, microwave background radiation and mute castrated choir.
Sadly, this appears to be lost, but hopefully it will turn up in some archive one day.There are a few others not mentioned.Arthur Bliss - Bazara: With mens voices ad lib.Alan Bush - Concerto for piano & orchestra with solo baritone and male choir (stupidly long and horrid)Pierre Capdevielle - Concerto for prepared piano, celesta, electronic organ and vocal ensemble (avant garde crap). Giorgio Ghedini - Concerto dell'albatro for piano, cello, narrator and orchestra. The narrator reads out sections of Moby dick. (I like this, recording on you tube).Eugene Hemmer - The voice of the Grand Piano for narrator, piano & orchestra.Andrzej Hundziak - Concertino for piano, childrens percussion & 3 part childrens or female chorus.Danilo Lorenzini - Concerto for piano & orchestra with one soprano voice.Maurice Ohana - Tombeau de Claude Debussy for piano, soprano, zither and chamber orchestra.Peter Schickele - Three Girls, Three Women for male sining pianist and orchestra.Leo Sowerby - Concerto for piano & orchestra with a soprano obbligato.Joseph Tal - Concerto III for piano & orchestra and tenor voice.Alexander Plinkovsky - Concerto for piano, banjo, microwave background radiation and mute castrated choir.