MUSIC THEORY

Music 221

Mod 30


Connectings Chord Whose Roots Are a Second* Apart

* Do not use the inversion (7th) in this connection, because the seventh is an awkward interval melodically.

 Four Voices

1) Move the three upper voices, in contrary motion to the bass, to the nearest chord tones


Click on this meaure to hear the connection in root movement of a second







2) Exception:  V - VI  (V - vi)     Whichever voice has the leading tone moves upward to the tonic (7-8).  After doing this, move the other voices contrary to the bass. This voice leading results in the VI (vi) chord having 1 root, 2 thirds, and 1 fifth.


Click separately on these meaures to hear correct and the incorrect voice leading







This procedure is necessary because if the basic rule of moving the upper voices contrary to the bass were followed, the melodic interval of an augmented 2nd would occur. (see the middle measure above)  In a major key, if the leading tone is in an inner voice, it may move down by step, producing a major 2nd.  However, even in a major key (in a V - vi progression) it is preferable to take the leading tone to the tonic.  Whether major or minor, if the leading tone is in the soprano, it must move upward to the tonic.


3 Voices

In three voices when the root movement is a second, it becomes necessary to go from a complete triad to an incomplete triad, or from an incomplete triad to a complete triad.


Click separately on these meaures to hear correct and the incorrect voice leading

In the first example above, if the soprano proceeded to the A producing a complete triad, there would be parallel fifths between soprano and bass.  If the alto then moved from D to E maintaining an incomplete chord, there would be parallel octaves between bass and alto.  Therefore, expect to alternate between complete and incomplete triads when the root movement is a second in three voices.


This page is designed to assist students enrolled in Music 221 - Music Theory.  If you had difficulty in class with the contents of this lesson, this may help you to comprehend the material. If you missed the presentation in class, this may help to update the material for you. If you still have questions, contact Dr. Bartolotta at wbartolo@odu.edu 
William S. Bartolotta
Music Department
Old Dominion University
Norfolk, VA 23529