A loop file extension is related to the Soundtrack Pro, a audio editing program. A .loop file stores some kind of data.
Software that open loop file
LOOP file extension - Apple Soundtrack Pro data
What is loop file? How to open loop files?
The loop file extension is associated with the Soundtrack Pro, a music composing and audio editing app for Mac OS X, developed by Apple.
The loop file stores some kind of data.
The default software associated to open loop file:
Apple Soundtrack Pro 
(obsolete software)
Company or developer:
Apple, Inc.
Apple Soundtrack Pro is used to mix and edit music for Mac OS X. It is discontinued product.
List of software applications associated to the .loop file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open loop file, edit loop file, convert loop file, view loop file, play loop file etc. (if exist software for corresponding action in File-Extensions.org's database).
Hint:
Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting loop files.
Software that open loop file - Apple Soundtrack Pro data
Programs supporting the exension loop on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about Apple Soundtrack Pro for open loop file action.
Apple macOS / Mac OS X:
Apple Soundtrack Pro (obsolete/discontinued)
