New projects default to a project tempo of 120 bpm and a key of Cmajor. If the first content added to a project is an Apple Loop (meaning, before any audio or MIDI have been added or recorded to the project), the project tempo and key are adjusted to match the Apple Loop. When a project already contains content (either by recording directly into the project or adding content), Apple Loops automatically match the current project tempo and key. If you subsequently change the project tempo, Apple Loops automatically conform to the new tempo. If you change the project key, the regions created from the loops are transposed to the new key.