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Among alternative tunings for the guitar, an open G tuning is an open tuning that features the G-major chord; its open notes are selected from the notes of a G-major chord, such as the G-major triad (G,B,D). For example, a popular open-G tuning is :D-G-D-G-B-D (low to high). An open-G tuning allows a G-major chord to be strummed on all six strings with neither fretting of the left hand nor a capo. Like other open tunings, it allows the eleven major chords besides G major each to be strummed by barring at most one finger on exactly one fret. Open tunings are common in blues and folk music, and they are used in the playing of slide and bottleneck guitars.〔 ==Repetitive variants for special instruments== Repetitive open-G tunings are used by Russian guitars, Dobro guitars, and banjos. They repeat three open-string notes. The repetitive open-G tuning :D-''G''-B-D-''G''-B-D is used by the Russian guitar, which has seven strings tuned mostly in major thirds.〔: 〕〔: 〕〔 〕 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「Open G tuning」の詳細全文を読む スポンサード リンク
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