| Value | Meaning |
|---|---|
| none"none" | There is no progression. |
| unknown"unknown" | The progress is unknown or does not fit a specific progression. |
| upwards"upwards" | The melody progresses upwards. |
| downwards"downwards" | The melody progresses downwards. |
| upDownwards"upDownwards" | The melody progresses up-downwards. |
| downUpwards"downUpwards" | The melody progresses down-upwards. |
| swingingUpwards"swingingUpwards" | The melody is swinging upwards. |
| swingingDownwards"swingingDownwards" | The melody is swinging downwards. |
| steady"steady" | The melody is steady. |
| steadySwing"steadySwing" | The melody has a steady swinging. |
| upSwing"upSwing" | The melody is swinging upwards. |
| downSwing"downSwing" | The melody is swinging downwards. |
Enumeration of musical progressions.