What is Open D tuning?
Open D is D A D F# A D, low to high. The open strings spell a D major chord using D, F♯, and A. Compared with standard tuning, the sixth, third, second, and first strings are lowered. No string is tuned above its standard pitch.
How to tune from standard to Open D
- Lower the sixth string from E2 to D2.
- Leave the fifth and fourth strings at A2 and D3.
- Lower the third string from G3 to F#3.
- Lower the second string from B3 to A3.
- Lower the first string from E4 to D4, then recheck all six strings.
Open D target frequencies
| String | Note | Frequency |
|---|---|---|
| 6 | D2 | 73.42 Hz |
| 5 | A2 | 110.00 Hz |
| 4 | D3 | 146.83 Hz |
| 3 | F#3 | 185.00 Hz |
| 2 | A3 | 220.00 Hz |
| 1 | D4 | 293.66 Hz |
Chords and slide playing
Strumming all open strings gives D major. A barre at the fifth fret gives G major, and a barre at the seventh fret gives A major. This makes major harmony easy to see across the neck and supports slide playing, fingerstyle arrangements, and songs built around ringing drone notes.
Open D versus Open E
Open D and Open E have the same interval pattern. Open E is two semitones higher on every string and requires raising three strings above standard. Open D has lower overall tension and is usually the gentler choice. To obtain an Open E sound with less added tension, tune to Open D and place a capo at the second fret.
Practical tips
- Learn Open D chord shapes instead of relying on standard diagrams.
- Retune gradually and make a second pass after all four changed strings settle.
- Heavier strings may improve feel if you use Open D permanently.
- For slide, place the slide above the fret and use only enough pressure for a clear note.