Open G tuning

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.

Usages in music
Open G tuning allows for open strings and single-fret bar chords to be played in key which make techniques such as slide and steel guitar viable. Open G tuning is common in blues and folk music (along with other open tunings).

Open G tuning particularly common in guitar music of Hawaiian origin including guitar styles such as slack-key guitar and steel guitar. In the context of slack-key music, open G is often referred to "Taro Patch" tuning (the term stems from taro, a traditional staple cuisine of Polynesian Hawaii). However, guitar is not a traditional Polynesian instrument; it was introduced to Hawaii by vaqueros hired by King Kamehameha III to assist with the nascent Hawaiian ranching industry in the mid 19th century.

Repetitive open-G tunings are used by Russian guitars, Dobro guitars, and banjos. They repeat three open-string notes.

The repetitive open-G tuning is used by the Russian guitar, which has seven strings tuned mostly in triads, in contrast to other guitars, which are tuned mostly in fourths.
 * D–G–B–D–G–B–D

Dobros use a full six-string tuning with a bottom G: G–B–D–G–B–D, low to high. The two lowest strings are, accordingly, tuned three semitones higher for the lowest string (from E up to G) and two semitones higher for the second-lowest string (from A up to B) while the highest string is tuned two semitones lower (from E down to D), relative to standard tuning.

Five-string banjo's standard tuning is also an Open G: g–D–G–B–D, where the lower case "g" denotes the highest-pitched "drone string", physically located next to (above) the lowest-pitched string, the first upper case "D".

Alan Sparhawk of Low has been using an Open G tuning his entire musical career, since being inspired by Sonic Youth as a kid.

Overtones of the fundamental note G




Bad Company guitarist Mick Ralphs has used another open-G tuning, which listed the initial six overtones of the G note, The overtones tuning G–G–D–G–B–D was used by Joni Mitchell for "Electricity", "For the Roses", and "Hunter (The Good Samaritan)". Truncating this tuning to G-D-G-B-D for his five-string guitar, Keith Richards plays this overtones-tuning on The Rolling Stones' "Honky Tonk Women", "Brown Sugar" and "Start Me Up". American rock band Eagles of Death Metal, uses this tuning for the majority of their songs.
 * G–G–D–G–B–D
 * for "Hey Hey" and while writing the demo of "Can't Get Enough".