Mendelssohn and Adès: Heras-Casado Conducts

When a conductor decides to lead a performance without a score, it really means two things. One is obvious: a deep and intimate familiarity with the music. Less obvious, though, is the implication of trust in the musicians of the ensemble. On Friday, young Spanish conductor Pablo Heras-Casado delivered a spectacular interpretation of Mendelssohn’s Symphony no.