Open Tunings for Guitar: A Practical Guide to DADGAD, Open G, and Open D

Open tunings change the open strings from standard EADGBE to form a chord when strummed open. This fundamentally changes how you think about the fretboard. Standard tuning is built for chromatic versatility — you can play in any key with movable shapes. Open tunings are built for resonance and voice leading — the open strings drone in the key of the tuning, and fretted notes create rich harmonic interactions with those drones.

DADGAD — the Celtic/tuning

Strings: D-A-D-G-A-D (low to high). Strummed open, it's a D5 chord (no third — neither major nor minor). This ambiguity is DADGAD's defining feature. A progression in D major sounds bright and open. The same shapes in D minor sound dark and modal. The tuning doesn't commit to major or minor until you fret the third.

DADGAD is popular in Celtic and folk music because the open-string drones create a harp-like quality. It's also used extensively in fingerstyle guitar (Pierre Bensusan, Andy McKee) and film scoring because the suspended, modal quality works for atmospheric texture.

Chord shapes in DADGAD don't resemble standard tuning shapes. A G chord requires completely different fingerings because the open strings are tuned to D and A instead of E and B. You can't use your standard-tuning chord vocabulary. You either memorize new shapes (slow) or use a tool that recalculates voicings based on the current tuning (fast).

Open G — the slide/blues tuning

Strings: D-G-D-G-B-D. Strummed open, it's a G major chord. Barre across all six strings at any fret and you get a major chord — the Keith Richards technique. Remove one finger from the barre on the second string and you get a minor chord.

Open G is the quintessential slide guitar tuning. The straight barre across all strings at one fret means every slide position is a chord. Delta blues slide players (Robert Johnson, Son House) used open G and open D almost exclusively.

For non-slide playing, open G offers rich, ringing chords that are impossible in standard tuning because every open string is part of a G major chord. A simple two-finger shape with open strings can sound more complex and resonant than a six-note barre chord in standard tuning.

Open D — the darker open tuning

Strings: D-A-D-F#-A-D. Open D major chord. One whole step lower than open E, which gives it a darker, warmer character. Same barre principle as open G: barre at any fret for a major chord.

Open D is favored by slide players who want a darker tone than open E and by fingerstyle players who want the DADGAD-like drone quality but with a major third (F#) instead of the ambiguous suspended fourth (G in DADGAD).

The tool problem with alternate tunings

In standard tuning, you can look up "Cmaj7 guitar chord" and get a diagram that works. In DADGAD, that same search returns standard-tuning diagrams that produce completely different (and wrong) notes.

You need a chord reference that recalculates based on your current tuning. You tell it your strings are D-A-D-G-A-D and it shows where C, E, G, and B actually sit on the current fretboard. Without this, you're doing the note-location math in your head for every chord — which is slow, error-prone, and discouraging enough that most guitarists try an alternate tuning once, get frustrated, and go back to standard.