F# Suspended 2nd (F#sus2)
Also written as Gb Suspended 2nd (Gb and F# are the same key).
1+2+5
Notes in F# Suspended 2nd
F# (root)G#C#
Inversions
Same notes as F# Suspended 2nd, with a different chord tone as the lowest note. Useful for smoother movement between chords instead of jumping around the keyboard.
Root position
F# in the bass
1st inversion
G# in the bass (F#sus2/G#)
2nd inversion
C# in the bass (F#sus2/C#)
Play F#, G# and C# together and you get F# Suspended 2nd.
Suspended chords pull the third out entirely, so they land somewhere between major and minor rather than picking a side. Sus2 fills the gap with a major second sitting close to the root, which gives it an open, slightly hollow color. It's a favorite way to add movement to a strummed or arpeggiated part without changing the underlying harmony.