en Altadefinizione. Live performance from 2018 of the unfinished work by composer Charles Ives. Inspired by the potential of the work, director Christoph Marthaler, stage designer Anna Viebrock and conductor Titus Engel joined forces to stage a performance of Ives' incomplete project, originally intended for more than 4,000 musicians, at the arts festival Ruhrtriennale in 2018.