Music Theory: From Absolute Beginner to Expert · 5th edition
Example 6.6
Compound meters: 6/8, 9/8 and 12/8
0:000:00
What you hear
For each meter a bar of the soft C3 counting its eighth notes alone (the bar's first a little louder), then two bars with the C5 on each dotted-quarter beat: two, three and four beats a bar; eighths at 120 a minute
In the book: Figure 6.9.