About the Dsus2 chord
To play D suspended 2nd, use the first shape above. Place your index finger on the 2nd fret of the G string and your middle finger on the 2nd fret of the C string. Leave the E and A strings open. Strum all four strings and check that each one rings cleanly.
Root
D
Quality
Suspended 2nd
Notes
D · E · A
How the Dsus2 chord works
D
Root(1)
The home note. It gives the chord its name.
E
Major second(2)
An open-sounding second that replaces the third.
A
Perfect fifth(5)
Adds strength and stability.