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Open D minor tuning (DADFAD)
DADFAD tuner online: open D minor, D A D F A D. The open strings ring D minor. Tune from standard with your phone's mic and hear each string.

One semitone apart from open D. Mika hears the F and calls it minor.The microphone closes when you stop, when all is in tune, or after half a minute of quiet. Nothing is recorded.
D2✓
Tap start. Play any string and let it ring. Without the microphone, tap a note above to hear it.
Open D minor: the strings and their notes
| String | Standard | Open D minor | Change | Hz |
|---|---|---|---|---|
| 1st string | E4 | D4 | a whole step down | 293.7 |
| 2nd string | B3 | A3 | a whole step down | 220.0 |
| 3rd string | G3 | F3 | a whole step down | 174.6 |
| 4th string | D3 | D3 | same | 146.8 |
| 5th string | A2 | A2 | same | 110.0 |
| 6th string | E2 | D2 | a whole step down | 73.4 |
DADFAD from standard
What open D minor is
Open D minor, written DADFAD after its six notes, tunes the open strings to a D minor chord. From standard the 6th, 2nd and 1st strings go down a whole step, and the 3rd goes down a minor third, from G to F. It is open D with the 3rd string a semitone lower: F instead of F♯, minor instead of major.
Players also call it cross-note tuning, the name it had in the pre-war blues: Skip James recorded in open minor tunings, and the dark, open sound of his guitar comes from strings that ring a minor chord with nothing fretted. Today it turns up in folk and fingerstyle, and in ambient guitar where the drone matters more than the chords.
How to tune to Open D minor from standard
With the tuner above: tap Start, play each string the table changes and turn until the needle sits in the middle. By ear, without the tuner:
- 6th string: E2 to D2. Its 7th fret should sound like the open 5th string (A2).
- 2nd string: B3 to A3. The 4th string at its 7th fret (A3) should sound like this string open.
- 1st string: E4 to D4. The 2nd string at its 5th fret (D4) should sound like this string open.
- 3rd string: G3 to F3. The 4th string at its 3rd fret (F3) should sound like this string open.
Then check the whole tuning once more with the tuner: retuning one string moves the neck, and the others drift a few cents.
On the same strings, tension follows the square of the pitch: the 1st, 2nd, 3rd and 6th strings keep 79 % of their pull. Slacker strings buzz and read flat at the attack; for more than a whole step down, a heavier set (or at least a heavier low string) keeps the feel.
What one finger plays
Strummed open, the strings ring Dm. A finger or a slide straight across the 5th fret gives Gm, across the 7th Am, and the 12th is Dm an octave up: the three chords of a blues in one straight line.
Playing in open D minor
- Minor and major in one move: fret the 3rd string at the 1st fret and the open strings ring D major again; that one note is the whole difference to open D.
- The 3rd string goes down three semitones, the biggest change in the tuning: tune it slowly, overshoot downward and come back up to F, so the string settles in the nut.
- Neither major nor minor: DADGAD, with G on the 3rd string and A on the 2nd.
All six strings in standard and the other tunings: the guitar tuner. Any note at all: the chromatic tuner.
Then play something
The notes you tuned can go into Brumm as a short melody over a beat. Hum a line on top and it becomes an instrument.
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