Db minor scale: The Db minor scale is the relative minor of Bb Major, meaning it shares the same key signature. It starts on Db and follows a similar pattern of whole steps and half steps.
Interval inversions: Interval inversions refer to flipping or reversing the order of notes within an interval. For example, if you have a major third interval (like C to E), its inversion would be a minor sixth (like E to C).
Key signature: A key signature is a set of sharps or flats placed at the beginning of each staff line in sheet music. It indicates which notes are raised or lowered throughout a piece in order to maintain consistency within a particular key.