Space plays and stops
- Notes and intervals
- F#M3A#m3C#2D#
F# Major 6, written F#6, is built from F#, A#, C# and D#: the root, major 3rd, 5th and 6th.
Its 3rd and 6th, A# and D#, are its guide tones: they say what kind of chord it is, so voicings are built around them and the root is often left to the bass.
In the progressions here, F#6 is the I6 of the Rhythm Changes in F#.