Open G tuning

 {
\clef "treble_8"
\time 3/4 \set Staff.midiInstrument = #"acoustic guitar (steel)"
<d, g, d g b d'>2.
<d, >4
<g, >4
<d >4
<g >4
<b >4
<d' >4
<d, g, d g b d'>2.
}

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.[1]

  1. ^ Sethares (n.d., p. 16)