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Open D Minor Guitar Tuner.

The darker side of an open D chord.

Tune open strings first. Fit your capo, then switch on “Check with capo on”.

Open D minorD A D F A D
REFERENCE TONEA4 = 440 Hz
D2
D · 6th string73.42 Hz

Choose a string below to hear its note.

PLAY A STRINGThickest Thinnest
6 strings · 3 seconds each
Sound & advanced settings

A gentle ping follows a steady note within 5 cents. Its volume follows the sound slider. Microphone audio stays on your device.

Check your intonation.

Compare one open string with the same string pressed at fret 12. Remove your capo and mute the other strings.

  1. 1. Tune and measure the open string
  2. 2. Press at fret 12 and measure again

Press just behind fret 12 with normal pressure. Do not play a harmonic. Repeat the comparison to confirm the result.

Check your six strings.

Press start, then sweep gently across all six open strings, from thickest to thinnest. Let them ring together.

Experimental: overlapping notes can be unclear. Select any result to measure that string alone in this window.

Check a known reference.

Play a steady reference from another device or instrument whose frequency you know. Enter that frequency below.

This compares your input with the reference you supply. It is not a certified calibration. Only numbers are saved, never audio.
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By ear: click a note, match your string, then move to the next. Keyboard: 1–6 to play · Esc to stop

KNOW YOUR TUNING

Open D minor: D A D F A D

Lower strings 6, 2 and 1 by a whole step and string 3 by two semitones to F. Compared with Open D major, only the third string changes, from F sharp to F.

The table shows the open-string setup at A4 = 440 Hz. For capo pitches, use the capo controls above.

Open D minor notes and frequencies from thickest to thinnest
StringNoteHzFrom standard
6 · thickestD273.422 semitones lower
5A2110.00unchanged
4D3146.83unchanged
3F3174.612 semitones lower
2A3220.002 semitones lower
1 · thinnestD4293.662 semitones lower

THE TUNEGUITAR GUIDE

Understand Open D minor

TuneGuitar guide · Updated 6 October 2026 · How we prepare our guides

The third string carries the distinction

D A D F A D differs from Open D major by one semitone on string 3. From ordinary standard G, however, reaching F requires a two-semitone descent. These are two different starting points; confusing them leaves the third string at F sharp and produces the major chord.

A major/minor comparison you can hear

Tune the open D-minor chord, then fret only string 3 at fret 1. That changes F to F sharp while all other strings keep ringing. Release the finger to return to minor. This original listening exercise isolates the third without retuning the instrument and makes the harmonic role of one string immediately audible.

Keeping the drones intact

The three D strings and two A strings provide a stable framework for melodic experiments. Mute the unused strings during the tuning measurement, then let them ring during practice. If a low D reading jumps while other strings resonate, it may be hearing those sympathetic notes. Check the low string alone before changing an otherwise correct setup.

Your string-by-string route from standard

This is a comparison of target pitches, not a recommendation to use every tuning on every guitar. Start from the tuning your instrument actually has. Use the directions and the octave labels together.

Standard → Open D minor
StringStartTargetAdjustment
6E2D2Lower 2 semitones
5A2A2Keep this target
4D3D3Keep this target
3G3F3Lower 2 semitones
2B3A3Lower 2 semitones
1E4D4Lower 2 semitones

Nearby tunings, compared by their actual notes

These are the three closest six-string presets by total semitone movement from this setup. The ranking describes target changes, not playing difficulty or physical suitability. A familiar name can hide a different middle-string layout.

What changes from this tuning?
Next tuningAll target notesStrings that change
Open DD2 · A2 · D3 · F♯3 · A3 · D43
DADGADD2 · A2 · D3 · G3 · A3 · D43
D standardD2 · G2 · C3 · F3 · A3 · D45, 4

READY FOR THE FIRST CHORD

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GOOD TO KNOW

Questions about Open D minor

What changes between Open D and Open D minor?

The third string falls one semitone from F sharp to F. That note changes the open chord from major to minor.

Can I reach Open D minor from DADGAD by moving one string?

Yes. Lower the third string from G3 to F3 and keep the D A D on the bass side and A D on the treble side. That two-semitone change replaces the suspended fourth with the minor third.

What should I listen for when checking the minor third?

Sound the open fourth string D3 and third string F3 separately, then together. F should sit three semitones above D. If it is F-sharp, you have the major version, even if every D and A string is correct.

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Last updated 13 September 2026.

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