Music Theory

   Lesson 19 April 12th, 2021 Lesson 19 Lecture notes: The deceptive cadence happens when a ( V or V7 ) chord resolves to a ( vi or VI ) chord at the end of a song. A deceptive resolution happens when a ( V or V7 ) chord resolves to a ( vi or VI ) chord in the middle of a phrase instead of a song's end . Usually, the dominant chord is inverted to weaken the sound to make the progression not sound like a strong cadence . The plagal cadence ( also known as the amen cadence ) happens when a ( IV or iv ) chord resolves to a ( I or i ) chord. In some instances, this is also considered a plagal resolution or plagal expansion when it follows behind a dominant-tonic cadence . The Phrygian cadence happens when a ( iv6 ) chord resolves to a ( V ) chord in a minor key , forming a type of half cadence . There are three basic root progression movements in tonal music that connect chords:  descending fifth , descending third , and ascending second . The photo above show

  Lesson 18 April 1st, 2021 Lesson 18 Lecture notes: There are four types of 6/4 ( second inversion ) chords; cadential 6/4 , pedal or neighboring 6/4 , arpeggiating 6/4 ,  and passing 6/4 . When writing the cadentia l 6/4 , you must always double the bass note . This helps to reinforce the dominant function. The cadential 6/4 falls on the strong beat . The pedal refers to a sustained or base note , and neighboring refers to the neighboring motion in the upper voices . There are no general voice-leading rules for the arpeggiating 6/4 except for the recommendation of putting it on a weak beat . Passing 6/4s allows first inversion chords to be interchangeable with root position chords and vice versa. Second inversion chords are not interchangeable with root position chords and must be used in specific ways. Second inversion chords are the most unstable of the set of inversions. The photo above shows a cadential 6/4 in C major. The photo above explains how arpeggiat