Open D
D A D F# A D
The open strings ring a D major chord. A slide-guitar staple with a deep, resonant voice — DADGAD's resolved major cousin.
Why learn this tuning
Open D gives an instant major-key drone with huge resonance — ideal for slide, fingerstyle, and songwriters who want lush open strings without fighting standard-tuning stretches.
String notes & reference tones
Tap a string to hear its target pitch. Strings are numbered 6 (lowest) to 1 (highest).
How to tune safely
- 1From standard: drop the 6th to D, keep the 5th (A), keep the 4th (D), drop the 3rd to F# (one semitone), drop the 2nd to A, drop the 1st to D.
- 2The 3rd string's one-semitone drop is easy to overshoot — approach it slowly from below.
- 3Strum open — you should hear an unmistakable D major.
Common uses
- Slide guitar
- Folk and blues fingerstyle
- Joni Mitchell and open-tuning songbooks
What happens to chord shapes
A one-finger barre gives a major chord at every fret. The relative geometry matches Open E (used by many electric slide players) two semitones lower, with friendlier string tension.
Practical tips
- Tune the 3rd string carefully — F# is only one semitone down and easy to pass.
- Barre frets 5 and 7 for G and A majors while drones ring underneath.
- If you love electric Open E slide, Open D is the acoustic-friendly cousin.
FAQ
How is Open D different from DADGAD?
Open D's open strings form a D major chord (with F#). DADGAD's open strings form Dsus4 (with G instead of F#) — more unresolved and modal.
Is Open D safe for my acoustic?
Yes for typical steel-string guitars. You're lowering several strings, so retune patiently and consider slightly heavier gauges if the feel is too floppy.
Keep practicing
Once you're in tune, run a focused drill — clean chord changes matter in every tuning.