Hi,
- Select the Audio event and hit P (Set Locators to Selection Range).
- Enable Cycle.
- Hit Playback.
- Project > Beat Calculator
- Tap Tempo
- Use Spacebar to tap the beats to find the average tempo.
- Insert the Tempo value At Selection Start.
- Open Sample Editor > Hit Points, enable Edit Hitpoints and set the Threshold for the hits, you want to quantise.
- Open Quantize Panel, enable Audio Warp.
- Set the grid and apply Quantize.