 E-E-e-e-e'-e' or D-D-D-D-d'-d'.The term "ostrich guitar" was coined by the Velvet Underground's Lou Reed after the pre-Velvet Underground song "The Ostrich"
by Lou Reed and the Primitives, on which he first recorded using this tuning, the first known commercial composition to make use of a trivial guitar tuning.The trivial tuning is a regular tuning based on the unison musical interval, which has zero semitones.