Rotate Left by Nudge Value ⌃⌥⌘←
Rotate the contents of the selected region to the left.
Rotating an audio region seems like such an odd thing to do, unless you’re making beats or constructing music. It certainly can make for some interesting sounds,
Move regions in the Logic Pro Tracks area — Apple Support
You can also rotate regions. Similar to slipping, rotating moves the region content left or right by the nudge value, but with the difference that content that extends past the region border on one side reappears on the other side, as though the region were a loop.
When an audio region is rotated, it is converted to a one-track folder (indicated by a folder icon in the upper-left corner of the region) containing two regions. If it is rotated multiple times, the number of regions in the one-track folder stays the same, but the junction point between the two regions moves through the folder, reflecting the extent of the cumulative rotation. You can unpack the one-track folder, or unpack and merge it to a single region, by clicking the folder icon and choosing corresponding commands from the menu that appears.