Balter's Strohbass appears on Hot (New Focus Recordings), an absorbing new disc by the saxophonist Ryan Muncy. Also featured are works by Georges Aperghis, Anthony Cheung, Aaron Cassidy, Chaya Czernowin, and Franco Donatoni. Muncy's collaborators are Nadia Sirota, Ben Melsky, Claire Chase, and Ensemble Dal Niente, who are presenting works of Johannes Kreidler in Chicago tomorrow.