In 1969, Uruguayan musician Eduardo Mateo joined with poet, actor, and theatre director Horacio Buscaglia to create Musicasión—a collection of fourteen performances over four productions, featuring musicians from Mateo’s band El Kinto and other artists from around the country. An album, released in 1971, comprises these performances and this week, thanks to the efforts of Juana Molina and Crammed Discs, sees a slightly belated 50th anniversary reissue, featuring 16 previously unreleased tracks.