-- correspondences, diaries, autobiographies
-- manuscripts, drafts, sketches and scores with musicians' notes / marks
-- posters, performance / recital programs.
-- reviews of first performance / recording / production in newspapers or other publications
--sound recordings, documentaries, videos of performance / rehearsals
-- interviews with musicians
-- photographs (original / reprint / digital format)
-- physical materials, such as instruments, costumes and other equipment.