In April, Nu Fest 2023 in Venice celebrates their memory and spirit with two events, on April 6th at the Fondaco dei Tedeschi and on April 29th at the Teatrino di Palazzo Grassi, with the projects Solaris (Giorgio Li Calzi-Manuel Zigante) and Impro Brain Sound Pod (Paolo Dellapiana-Valeria Sturba). What is the Nu Fest 2023…