Music Theory: From Absolute Beginner to Expert · 5th edition
Example 6.23
Pattern 9: eighth-note triplets
0:000:00
What you hear
A bar of the pulse alone, then four bars of an eighth-note triplet, an eighth-note triplet, an eighth-note triplet on every beat (C5), 60 BPM over a soft pulse on C3
In the book: Figure 6.27.