 While movable do is easier to teach and learn, some feel that fixed do leads to stronger sight-reading and better ear training because students learn the relationships between specific pitches as defined independently, rather than only the function of intervals within melodic lines, chords, and chord progressions.If a performer has been trained using fixed do, particularly in those rare cases in which the performer has absolute pitch or well-developed long-term relative pitch, the performer may have difficulty playing music scored for transposing instruments