The Colorado Symphony's Jerry Garcia Symphonic Celebration concert at Red Rocks Amphitheatre outside Denver last summer. If you squint, you can see a cloud of something that's probably not pot smoke. Matt Korona/Courtesy of the Colorado Symphony hide caption

itoggle caption Matt Korona/Courtesy of the Colorado Symphony

NPR Music's Ann Powers (right) interviews musicians (from left) Mike McCready of Pearl Jam, Alynda Lee Segarra of Hurray for the Riff Raff, Sharon Jones and Meshell Ndegeocello at the EMP Pop Conference in Seattle. Brady Harvey hide caption

itoggle caption Brady Harvey

Trumpeter Geraldo Marshall and trombonist Johannes Utas, students at the Duke Ellington School of the Arts, rehearse for their school's 40th anniversary celebration. Lauren Migaki/NPR hide caption

itoggle caption Lauren Migaki/NPR

Izzat Majeed address a crowd in New York during a collaborative concert between Sachal Studios musicians and the Jazz at Lincoln Center Orchestra. The Lahore-born philanthropist founded a recording studio and provided opportunities for musicians in Pakistan. Hiroyuki Ito/Getty Images hide caption

itoggle caption Hiroyuki Ito/Getty Images