About the Dsus4 chord
To play D suspended 4th, use the first shape above. Place your index finger on the 2nd fret of the C string and your middle finger on the 3rd fret of the E string. Leave the G and A strings open. Strum all four strings and check that each one rings cleanly.
Root
D
Quality
Suspended 4th
Notes
D · G · A
How the Dsus4 chord works
D
Root(1)
The home note. It gives the chord its name.
G
Perfect fourth(4)
A suspended fourth that replaces the third.
A
Perfect fifth(5)
Adds strength and stability.