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A re-entrant tuning is a tuning of a stringed instrument where the strings (or more properly the courses on coursed instruments) are not ordered from the lowest pitch to the highest pitch (or vice versa). A break in an otherwise ascending (or descending) order of string pitches is known as a re-entry. Most common re-entrant tunings have only one re-entry. In the case of the soprano ukulele, for example, the re-entry is between the third and fourth strings, while in the case of the Venezuelan cuatro it is between the first and second strings. Instruments often tuned in this way include: * Soprano and concert ukulele. * Theorbo * Laouto * Baroque guitar * Mexican vihuela * Venezuelan cuatro. * Five string banjo. * Andean charango. * Sitar. * Ainu tonkori * The E9_tuning Pedal_steel_guitar Instruments occasionally tuned in this way include: * Tenor ukulele * Ten string extended range classical guitar * Tenor guitar * Guitar (Nashville tuning) * C6_tuning Pedal_steel_guitar The tunings of coursed instruments, such as the twelve string guitar and eight string bass, are not considered re-entrant provided that the principal strings of each course are ordered from lowest to highest. ==Ukulele== Ukuleles other than the tenor and baritone are most commonly tuned in re-entrant fashion. These conventional re-entrant tunings are sometimes known as ''high 4th tunings''. Non re-entrant tunings, also known as ''low 4th tunings'', exist for these instruments. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Reentrant tuning」の詳細全文を読む スポンサード リンク
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