Spitfire Audio Eric Whitacre Choir (ESD); virtual choir; extensive collection of human voices recorded with Grammy-winner Eric Whitacre and 22 professional singers; ideal for orchestral, cinematic, and experimental music production; recorded at AIR Studios Hall using 6 microphone positions; 22 singers in SATB configuration including 6 sopranos, 5 altos, 5 tenors and 6 basses; over 170 traditional and experimental vocal techniques; 111 evolutions organised via integrated Evo Grid interface; Evo Grid allows generative or user-defined evolving textures; articulations include sustains, shorts, rhythmic phrases, overtone clusters, whispers, gritty textures;