“开放和弦”是相对于“封闭和弦”而言的，是用食指或者中指或者无名指在一品上2-5根弦的和弦。又称小横按。
在吉他演奏中，开放式调弦是将各弦调成一个和弦，这样就不需按弦就可以弹出来。
In guitar playing, an open tuning is one where the strings are tuned so that a chord is achieved without fretting, or pressing any of the strings.
总的来说，开放式调弦指的是将弦的音高改变，来达到大调及小调和弦的效果。
Generally, Open Tunings refer to the changing of string pitches to reproduce common Major and Minor chords.
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