We have zero clue what to expect. The promo copy reads as follows: “The Timeless Moment combines various works by Impressionist Claude Debussy and Territoires de l’ouubli for solo piano by Tristan Murail (the leading exponent of spectral music) to create an intoxicating blurring of sensory order … The audience dives into the world of darkness and experiences the music with all their senses. Sounds become visual landscapes that move in inner worlds beyond the prejudices of seeing.” Alain Franco, heard on piano, is also credited with the “musical concept.” Silvia Costa is responsible for staging and décor, Nicola Ratti for sound design, and Marco Giusti for lights. Michele Taborelli assisted with the set; the dramaturg of record is Christoph Lang. Whatever there is to look at, the auditory element should be otherworldly. —Matthew Gurewitsch