tuning repeats its octave after three strings, which again simplifies the learning of chords and improvisation. Neighboring the standard tuning is the major-thirds tuning that has the open strings E-G-C-e-g-c'. A lower major-thirds tuning has the open strings C-E-G-c-e-g, which "contains two octaves of a C augmented chord". All fourths E-A-d-g-c'-f' This tuning is like that of the lowest four strings in standard tuning. Jazz musician Stanley Jordan plays guitar in all-fourths tuning; he has stated that all-fourths tuning "simplifies the fingerboard, making it logical". Augmented fourths C-F-c-f-c'-f' or B-F-b-f-b'-f' Between the all-fifths and all-fourths tunings are augmented-fourth tunings, which are also called "diminished-fifths" or "tritone" tunings. All fifths: "Mandoguitar" C-G-D-A-E'-B' or G'-D-A-E'-B-F' All-fifths tuning is a tuning in intervals of perfect fifths like that of a mandolin, cello or violin; other names include "perfect fifths" and "fifths". It has a wide range, thus it requires an appropriate range of string gauges. A high b string has been recently developed by Octave4Plus gauged at .006 which is pretty thin, but under really low tension to prevent breakage. New standard tuning C-G-D-A-E'-g' All-fifths tuning has been approximated by the New Standard Tuning (NST) of King Crimson's Robert Fripp. It has a wider range than standard tuning, and its perfect-fifth intervals facilitate quartal and quintal harmony. Ostrich tuning E-E-e-e-e'-e' or C-C-c-c-c'-c' Ostrich tuning is a tuning where all strings are tuned to the same note over two or three octaves, creating an intense, chorused drone and interesting fingering potential. Used by Soundgarden (E-E-e-e-e'-e') on the song "Mind Riot", and by Lou Reed in the Velvet Underground. Dropped Drop tunings lower the sixth string, dropping the lowest E string of the standard tuning. Some drop tunings also lower the fifth string (the A-note in standard-tuning). A drop one tuning lowers the pitch by one full step. Some lower tunings may call for a baritone guitar to more easily maintain high string tension and a rich tone. Others can be achieved using a capo and/or a partial capo. Examples Drop D - D-A-D-G-B-EStandard tuning but with the 6th string dropped one full step. Utilized by bands and/or artists: HUM, Radiohead, Avenged Sevenfold, Arrowmont, Kvelertak, Led Zeppelin on "Moby Dick", Jack White on the song "High Ball Stepper", Rage Against the Machine, Bon Jovi, Prayer for Cleansing, Lamb of God, Underoath, Evanescence, Silverchair, Muse, FTISLAND, Godsmack, Marilyn Manson, Skillet, Helmet, DAY6, Soundgarden, Metallica on "All