You can use Pro Tools to create a simple tempo map of prerecorded audio material by following a few simple steps.
Go to the Windows menu and select Memory Locations.
In the window that pops up, click on the mini menu icon (pictured below) and select auto name memory locations.
Make sure that the conductor icon is turned on.
Also check to make sure that the selected time reference is either Samples or Min:Sec. (The Marker placement will then default to Absolute.)
Next, you’ll want to create a series of markers at consecutive time positions in your audio material. You can see in the image below that markers have been created at the very beginning and end of the audio material, which is an 8 bar drum loop at a 4/4 time signature. You can easily create markers by pressing Enter on the numeric keypad.
Click the first marker, then hold shift to select the following marker. This should give you a connected time span. Then hit the key command Command I. Next you will need to mark the start and end bar/beats based on the number of bars/beats in the audio material. Don’t forget to include the respective time signature information. This file is a very simple 8 bar 4/4 clip.