The following audio files can automatically match the project tempo and will follow any tempo changes made in the global Tempo track:
Audio recordings made in Logic Pro for Mac (7.0 and later)
Note: If you drag a file recorded in one project to another project using the Finder, the file does not follow the project tempo. However, files copied between two projects are able to follow the project tempo if the Flex & Follow region parameter is not set to Off.
Apple Loops
Audio regions on tracks for which Flex Time is turned on
Audio bounces made in Logic Pro (7.0 and later)
Note: Bounce files can only follow the project tempo if the Add resulting files to Project Audio Browser option is selected in the Bounce dialog when the file is bounced or exported. As with audio recordings, the bounce conforms to the project tempo if the Flex & Follow region parameter is not set to Off.
Audio files exported from Logic Pro (7.0 and later)
Note: Exported files can only follow the project tempo if the Add resulting files to Project Audio Browser option is selected in the Export dialog when the file is bounced or exported. As with audio recordings, the bounce conforms to the project tempo if the Flex & Follow region parameter is not set to Off.
Audio files that follow the project tempo (and first key signature) are flagged with the Follow Tempo symbol, in both the PDF
Logic Pro Instruments: PDF