The Major Scale
The scale you know, now in swing over a major 7th chord (Cmaj7). Then the chord itself: C, E, G, B. Hear how the B makes it sound like jazz.
34
Notation
Valves
C · Open
Beat by beat · Cmaj7
96bpm
60160
Piano sound: Salamander Grand Piano V3 — Alexander Holm, CC BY 3.0
Trumpet sound: University of Iowa Electronic Music Studios