Chord sequence
F♯maj7 D♯m7 G♯m7 C♯7
In every key
Four-note rootless voicings in their two forms, with the 3rd or the 7th on the bottom, played over the root.
Heard in F# major
All the chords
The basic turnaround: diatonic chords falling in fifths from vi back to I, two to a bar, to bring a tune back to the top.
Over F#maj7 · Imaj7
The major scale and its modes are the most commonly used scales in western music.
Over D#m7 · vi7
Mode 6 of Major
Over G#m7 · ii7
Mode 2 of Major
Over C#7 · V7
Mode 5 of Major