Guitar tuning · D A D F♯ A D
Open D tuner.
D A D F♯ A D: an open D major chord. Tune with your mic or by ear, at A4 = 440 or any pitch you need.
Tuner · Any tuning
Tune your guitar.
Pluck a string and the meter shows how far off it is. Tap any string to hear it at its true pitch and tune by ear.
- Pick any instrument and tuning
- Shift it down or up by half steps
- Set A to anything: 440, 432, 442…
D A D F♯ A D
Check string tension →The sound never leaves your device.
Keys: Space start or stop · ← → half step · ↑ ↓ A (Shift: bigger steps) · 1–9 string · M mode · R hear · − + volume · L copy link · Esc done
Ready
Strings 1 → 6
3 times each
Tap Start, then pluck any string.
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Strings · tap to hear
Instrument
Try uke, bari, 5 string, cello…
Tuning
Open D
Shape
Shift
Standard pitch
Higher or lower
Fine-tune
Moves every string a little, for example to match a recording.
Custom tuning
Any strings, any notes
One row for each string. The top row is the top string, usually the thickest.
Start from
Strings
+ adds a lower string at the top. − takes the top string away.
Notes from C0 to C8. Type a note like D2, F♯3 or B♭1, or use − and +.
Save and use keeps it on this device (up to 8 tunings). Use without saving tunes with it for now.
Reference A
Slider 380–500 Hz. Type any value from 300 to 600 Hz.
More pitches
Sound
Violin, viola, cello and double bass start with Bowed, the rest with Acoustic.
Note length
Match a recording Beta
Find the A a song was recorded at, then tune to it and play along.
…listening
Play the song, loud and clear.
Result
This recording sits on A 440
The tuner already matches it: nothing to change.
A recording is only known within a half step: if the song is a half step down, also change the tuning.
Beta: tested on real records and synthetic songs. Check the result by ear.
Nothing is uploaded: the sound is measured on this device.
Settings
Mode
Guided: one string at a time, from the thickest.
Meter
Bar: a slider with a mint in-tune zone.
Note length
How long a tapped string and Hear sound. Repeat plays the string again every few seconds, Continuous holds it: tap it again to stop.
Reference sound
Violin, viola, cello and double bass start with Bowed, the rest with Acoustic. A sound you pick stays.
Volume
Phone speakers play very low notes an octave up.
Note names
Sharps and flats
Octave numbers (E2, E4)
Tells the two E strings apart: E2 is the low one, E4 the high one.
Frequencies (Hz)
Each string's pitch in hertz, such as 82.4 Hz.
In tune within
Precise is not used with harmonics: Normal ±3 applies.
Harmonic mode
For one low string: play its 12th-fret harmonic (×2) or its 5th-fret one (×4).
Pro view
The pitch heard in Hz, tenths of a cent and the input picker. Turns on octave numbers and frequencies.
Device names appear after you allow the microphone.
Input channel
Auto picks the channel with sound. Interfaces: choose the input your instrument is plugged into.
Background
Night ocean, cosmos, forest and more.
The sound never leaves your device. No account, no cookies.
Guitar · Open tuning
About Open D
Strum the open strings and you hear a D major chord: D A D F♯ A D. Open tunings are made for slide guitar and for big ringing chords with few fingers.
Open D is a favorite for slide guitar and folk. Four strings change from standard, and none of them goes up, so it is gentle on the strings.
Also written: DADF#AD
How to get there from standard
- String 6: lower a whole step (E2 → D2)
- String 5: no change (A2)
- String 4: no change (D3)
- String 3: lower a half step (G3 → F♯3)
- String 2: lower a whole step (B3 → A3)
- String 1: lower a whole step (E4 → D4)
Quicker from DADGAD: lower String 3 a half step (G3 → F♯3).
Why players use it
Why Open D
Open D, D A D F♯ A D, puts a D major chord on the open strings with the root at the bottom and at the top. The thumb can alternate between the two low D strings while the fingers pick a tune above, and the top three strings, F♯ A D, make a small major chord at every fret for slide lines. Lower String 3 one more half step, to F, and you have Open D minor.
On the records
Who plays in Open D
Older blues books call it Vestapol tuning. Keith Richards moved to it, and to Open E, for the acoustic guitars of the Rolling Stones' Beggars Banquet (1968) and Let It Bleed (1969), before he settled on Open G. TuneLit has three songs in it: Street Fighting Man and Stray Cat Blues from Beggars Banquet, and You Got the Silver, played with a capo at the 3rd fret.
Songs on TuneLit
Famous songs in Open D
Each song has its own page: the exact tuning, the pitch of the record and how to get there string by string. Tune sets the tuner to the record, cents included.
- Street Fighting ManThe Rolling Stones · Beggars Banquet (1968) · −36 ¢Tune
3 songs · 1 band
Every Open D song on TuneLit
Open a band to see its songs in this tuning. Each song opens on its album page, at its own Tune button, set to the pitch of the record.
The Rolling Stones 3 songs
Playing tips
Playing in Open D
Street Fighting Man sits about 36 cents flat on the record (A ≈ 431), so a guitar in Open D at A 440 sounds sharp against it; its Tune button sets the reference for you. Open E is the same chord shape a whole step higher, so a capo at the 2nd fret plays Open E songs without raising a single string. For slide, hold the slide right over the fret wire and rest it lightly: pressing down pulls the notes sharp.
6 strings
Notes and frequencies
| String | Note | A = 440 | A = 432 | A = 442 |
|---|---|---|---|---|
| 6 | D2 | 73.42 | 72.08 | 73.75 |
| 5 | A2 | 110.00 | 108.00 | 110.50 |
| 4 | D3 | 146.83 | 144.16 | 147.50 |
| 3 | F♯3 | 185.00 | 181.63 | 185.84 |
| 2 | A3 | 220.00 | 216.00 | 221.00 |
| 1 | D4 | 293.66 | 288.33 | 295.00 |
The tuner on this page works at any A4 from 300 to 600 Hz, and can shift the whole tuning by half steps or fine cents.
Measured
How the tuner hears D2
Open D goes down to D2 on String 6, 73.42 Hz. A phone mic hears D2 faintly: in our phone-mic model its fundamental arrives 6 dB quieter. Read from its overtones, D2 stayed within 1 ¢.
String tension
Strings and tension
Strings 6, 2 and 1: about 21% less tension. String 3: about 11% less tension (approx., same strings, same scale length).
Most players keep their usual strings for this. If the lowest string feels floppy or buzzes, go one gauge heavier on that string only.
Check string tension → String by string, with your own set and scale length.
Neighboring tunings
Higher tunings first. Each rung moves every string of Open D by a half step; in the tuner, the ◂ ▸ arrows on the tuning chip do the same.
- Open EOpen strings ring an E chord. Notes: E B E G sharp B E
- Open E♭Open strings ring an E♭ chord. Notes: E flat B flat E flat G B flat E flat
- Open DThis pageOpen strings ring a D chord. Notes: D A D F sharp A D
- Open D♭Open strings ring a D♭ chord. Notes: D flat A flat D flat F A flat D flat
- Open COpen strings ring a C chord. Notes: C G C E G C
Questions
What are the notes of Open D?
From String 6 to String 1: D2 A2 D3 F♯3 A3 D4. At A4 = 440 Hz the lowest string is 73.42 Hz and the highest is 293.66 Hz.
What chord do the open strings of Open D make?
A D major chord: D A D F♯ A D. With a slide or one finger across all strings, fret 5 gives G major and fret 7 gives A major.
Can I use Open D at A = 432 or 442?
Yes. Tap the A 440 chip and choose 432 or 442, or type any value. String 6 is 72.08 Hz at A = 432 and 73.75 Hz at A = 442.