频率是每单位时间重复事件的发生数量。它是在赫兹（Hz）中测量的。
1 oct = 120 rpm
1 rpm = 0.008 oct
例子:
将15 八度转换为每分钟革命：
15 oct = 1,800 rpm
| 八度 | 每分钟革命 |
|---|---|
| 0.01 oct | 1.2 rpm |
| 0.1 oct | 12 rpm |
| 1 oct | 120 rpm |
| 2 oct | 240 rpm |
| 3 oct | 360 rpm |
| 5 oct | 600 rpm |
| 10 oct | 1,200 rpm |
| 20 oct | 2,400 rpm |
| 30 oct | 3,600 rpm |
| 40 oct | 4,800 rpm |
| 50 oct | 6,000 rpm |
| 60 oct | 7,200 rpm |
| 70 oct | 8,400 rpm |
| 80 oct | 9,600 rpm |
| 90 oct | 10,800 rpm |
| 100 oct | 12,000 rpm |
| 250 oct | 30,000 rpm |
| 500 oct | 60,000 rpm |
| 750 oct | 90,000 rpm |
| 1000 oct | 120,000 rpm |
| 10000 oct | 1,200,000 rpm |
| 100000 oct | 12,000,000 rpm |
规则