 For example, the leading tone of alternating C chord and F minor chords is either the note E leading to F (if F is tonic), or A leading to G (if C is tonic).In works from the 14th- and 15th-century Western tradition, the leading tone is created by the progression from imperfect to perfect consonances, such as a major third to a perfect fifth or minor third to a unison.The same pitch outside of the imperfect consonance is not a leading tone.