In January 2018, the Music Library Association released the Music Discovery Requirements 2 (MDR2) freely online. The MDR2 explores “discovery needs specific to and especially important for music materials, particularly scores and recordings.” We recommend it to everyone creating or configuring discovery systems that will include music, including vendors, systems librarians, and music librarians. The MDR2 updates the 2012 MDR and in particular incorporates: RDA updates, MARC updates, LCGFT, and LCMPT. The MDR2 is available in an easy-to-navigate HTML version and as a full pdf download. A plan is also in place for ongoing maintenance of the MDR.