Musica Viva 23: Ausklang, Musik für Klavier mit Orchester is a live recording of Helmut Lachenmann's 1984/1985 composition 'Ausklang', performed by pianist Pierre-Laurent Aimard and the Bavarian Radio Symphony Orchestra under conductor Jonathan Nott, released in 2016. The work exemplifies Lachenmann's 'instrumental musique concrète' approach, exploring unconventional playing techniques and sound textures to expand the expressive possibilities of the piano and orchestra.