Esperanza Spalding Tests the Limits of Improvisation Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email U.S Jazz musician and singer Esperanza Spalding performs at the International Jazz Day concert at the Alicia Alonso Theater in Havana, Cuba, Sunday, April 30, 2017. ( Ramon Espinosa / Associated Press ) Produced by Hillary Bonhomme Hosted by Todd Zwillich Produced by PRI and WNYC