DADGAD (often said "dad-gad") is one of the most loved alternate tunings on the guitar. You retune just three strings, and suddenly the open guitar rings like a harp, droning strings hum under everything you play, and simple shapes sound rich and haunting. It's the tuning behind Led Zeppelin's "Kashmir," and it has long been a favourite in Celtic and acoustic folk playing. If you've ever wanted your guitar to sound bigger without learning harder chords, this is a great place to start.
In standard tuning your open strings, from the thickest string (string 6, nearest your chin) to the thinnest (string 1), are E A D G B E. In DADGAD they become D A D G A D.
Only three strings move, and all three go down by a whole step. A whole step is the distance of two frets; a half step is one fret.
Because you're only loosening strings, it's gentle on the guitar and quick to get into.
A clip-on tuner makes this easy, but it's worth learning to do it by ear too, so you start hearing how the strings relate.
When two notes are almost in tune, you'll hear a wobbling "wah-wah" beat. Keep adjusting slowly until that wobble disappears.
Strum all six open strings. You're hearing just three different notes: D, A and G. Three D's, two A's and one G.
That combination has a lovely open, unresolved quality. It isn't happy or sad; it sounds like it's floating, waiting to go somewhere. Players often call it a Dsus4 sound, because the G takes the place where a normal D major chord would have its middle note.
Here's the magic: change one or two notes and the open strings keep ringing around them. Those ringing open strings are called drones, notes that keep sounding underneath everything else, like the hum of bagpipes. That's a big part of why DADGAD suits Celtic music so well.
Try these two simple chords:
Switch between the open strum, D5 and D major and listen to how the mood shifts while the outer strings keep humming.
Because the open strings already form a pleasing chord, one or two fingers can produce something that would need a big stretch in standard tuning. Beginners often find this freeing: you can sound good quickly and focus on rhythm and feel.
The bottom three strings, D A D, form a power chord when played open. A power chord is a simple two-note chord (root and fifth) that sounds strong and punchy, especially with distortion. Lay one finger flat across those three strings and slide it:
One finger, deep and heavy. The dropped low D also gives you a darker bottom end than standard tuning.
Strings 3 and 2 are G and A, only a whole step apart. In standard tuning they're further apart. This close pairing lets you play scale notes that overlap and ring into each other, creating that shimmering, harp-like effect DADGAD players chase.
Here's the honest part: your familiar standard-tuning shapes won't work as-is. But the changes follow a clear pattern.
Rather than converting old shapes, many players learn DADGAD fresh, by ear, using the open strings as home base. That's a great approach.
Strum the open strings slowly, letting them ring. Then, keeping your strum steady, fret string 3 at the 2nd fret for a bar, go back to open, then try the D major shape. Next, pick string 6 open and add notes on string 3 at frets 2, 4 and 5 while the other strings ring freely. Don't worry about rules; just listen to how notes blur together. Spend ten minutes a day simply exploring, and you'll soon find your own little melodies hiding in this tuning.
More on the instrument itself: the 6-String Guitar guide.