Triplets
Three even notes in one beat: "tri-po-let". Swing is built on this feel. Keep the three notes exactly even, then land on the quarter note.
10
Notation
Valves
C · Open
Beat by beat · C6
92bpm
60140
Piano sound: Salamander Grand Piano V3 — Alexander Holm, CC BY 3.0
Trumpet sound: University of Iowa Electronic Music Studios