Although John Cage occasionally worked in large, sophisticated studios - for example, when he composed Fontana Mix in 1958 - his approach to electronic and tape music was often uncomplicated, makeshift, and pragmatic, employing simple tabletop devices: tape machines, phonograph cartridges, contact microphones, record players, portable radios, etc.

Great Bear Pamphlet: Each pamphlet is simply produced with black printing on colored sheets of paper (each pamphlet a different color) except for Cage’s poem DIARY:

Ein historisches Dokument.

Den Käfig der Vögel betreten, ohne sie zum Singen zu bringen.

Chuang-tse