Select an audio loop To control tempo, you will need to know the length of your loop in bars/beats. If it’s an Apple Loop, the number of beats are listed ri...

https://www.apple.com/jp/logic-pro/resources/docs/alchemy_for_creative_loop_manipulation_0818.pdf

Elemental Morphing In Alchemy 4. Add first audio sample Open the Apple Loops browser and type ‘Lockstep’ in the search field. Drag the loop “Lockstep Beat 0...

https://www.apple.com/jp/logic-pro/resources/docs/elemental_morphing_in_alchemy_0818.pdf