Space plays and stops
- Notes and intervals
- C#M3E#m3G#M3B#
C# Major 7, written C#maj7, is built from C#, E#, G# and B#: the root, major 3rd, 5th and major 7th.
Its 3rd and 7th, E# and B#, 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, C#maj7 is the IIImaj7 of the Coltrane Changes in A.