The Apple Loops Utility software is a small companion utility to Soundtrack Pro, GarageBand, Logic Express, and Logic Pro, all made by Apple Inc. Apple Loops Utility allows users to create loops of audio that can be time-stretched. Audio files converted to "Apple Loops" via the Apple Loops Utility can also be tagged with their publishing (Author, Comments, etc.) and musical information (Key, Tempo, etc.). Multiple files can be tagged at the same time, a process known as batch tagging.