In 2008, the Aga Khan Music Initiative and the San Francisco-based Kronos Quartet inaugurated a pioneering musical collaboration that brings the quartet together with leading musicians from AKMI countries to compose, arrange, and perform new music rooted in regional traditions. The first AKMI-Kronos collaboration features Homayoun Sakhi’s “Rangin Kaman” (“Rainbow” in Persian), a composition for Afghan rubab, tabla, frame drum and string quartet. The string quartet parts, which Sakhi composed on a Casio synthesizer, were arranged for Kronos by Stephen Prutsman, a long-time Kronos collaborator.