Extracting a Tempo Definition Grid from Audio
If you have an audio file with an unknown tempo or a beat that is not straight, and you want to match it to the project tempo, you must first extract its tempo definition grid. This is done with the Auto Adjust function in the Definition section of the Sample Editor.
Prerequisite
You have defined a range in your audio clip or event that starts and ends at a barline.
Procedure
Result
The definition grid is calculated for the selected section. The snap point moves to the start of the selected range. The audio tempo definition ruler changes to reflect your edits, and bars and beats positions are marked with vertical lines.