About the F#sus4 chord
To play F# suspended 4th, use the first shape above. Place your index finger on the 1st fret of the C string, your middle finger on the 2nd fret of the E string, your ring finger on the 2nd fret of the A string, and your pinky finger on the 4th fret of the G string. Strum all four strings and check that each one rings cleanly.
Root
F#
Quality
Suspended 4th
Notes
F# · B · C#
How the F#sus4 chord works
F#
Root(1)
The home note. It gives the chord its name.
B
Perfect fourth(4)
A suspended fourth that replaces the third.
C#
Perfect fifth(5)
Adds strength and stability.