Andy Brick, composer, conductor, symphonist


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01/27/06




Theory I


Class Notes 13a

Semester Review

Please note: All references to "Aldwell Audio " can be found on
"2 CD set to accompany Harmony & Voice Leading 3rd Edition"


All other items can be found in zip file on index page

Scales &Keys

  1. Terms: Scale Degrees

    1 Tonic
    2. Supertonic
    3. Mediant
    4. Subdominant
    5. Dominant
    6. Submediant
    7. Leading Tone
    8. Octave

Rules to Construct and identify Major key signatures

1. Major Keys #

a. Construct: Begin with F# and continue up in 5ths: F#, C#, G#, D#, A#, E#, B#

b. Identify: The last sharp in the key signature is 1/2 step lower than the Major key. (ie 3#'s (F#, C#, G#) = A Major)

1. Major Keys b

a. Construct: Begin with Bb and continue down in 5ths: Bb, Eb, Ab, Db, Gb, Cb, Fb

b. Identify: The penultimate b in the keysignature is the Major Key (ie 4bs (Bb, Eb, Ab, Db) =Ab Major (1b=F)

  1. Terms:
    1 Passing Tone
    2. Neighbor Tone
    3. Incomplete Neighbor
    4. Double Neighbor

Rules to Construct and identify Natural Minor key signatures: A natural minor = no #'s or B's

1. Natural Minor Keys #

a. Construct: Begin with F# and continue up in 5ths: F#, C#, G#, D#, A#, E#, B#

b. Identify: The last sharp in the key signature is a whole step higher than the natural minor key. (ie 3#'s (F#, C#, G#) = F# Natural Minor)

2. Natural Minor Keys b

a. Construct: Begin with Bb and continue down in 5ths: Bb, Eb, Ab, Db, Gb, Cb, Fb

b. Identify: The penultimate b in the keysignature is the minor 3rd of the natural minor Key (ie 4bs (Bb, Eb, Ab, Db) where Ab is the minor 3rd of F minor

Note: The Natural Minor is the only form of minor that is represtented by a keysignature and will always be a minor 3rd below its corresponding or "Relative" Major Key

Rules to Construct and identify Harmonic and Melodic Minor key signatures

3. Harmonic Minor

a. We already saw that the 1/2 steps in Major have a strong gravitational pull. Of particular importance was the pull from the leading tone to the tonic (octave). In order to preserve that critical gravitational pull we often raise the 7th scale degree of the Natural minor one half step thereby transforming it to Harmonic minor.

4. Melodic Minor

a. By raising the 7th scale degree in Harmonic Minor, we get an awkward interval between 6 and 7 which sounded foreign to 18th century ears. Hence, to avoid such an interval, a melody that rises to the leading tone of Harmonic minor can avoid that awkward interval by also raising the 6th scale degree. When both the 6th and 7th scale degrees of the natural minor key are raised a half step, it is considered melodic minor.

Intervals

Major (M)
Minor (m)
Perfect (P)
Augmented (A)
Diminished (d)

Group 1) Unison, 4th, 5th & 8va

Group 1 qualitive identifier: If the upper tone of an interval is in the major key of the lower tone, the interval is Perfect. If it is a half step higher it is Augmented. If it is a half step lower, the interval is Diminished

By displacing the lower tone of a simple interval 8va, it become an upper tone and the interval is aid to be inverted. The sum of an interval and its inversion will always = 9 and its qualtiy will be similarly inverted as follows:

Major <-> Minor
Augmented <-> Diminished
Perfect <-> Perfect

Group 2) 2nds, 3rds, 6ths, 7ths

Group 2 qualitive identifier: If the upper tone of an interval is in the major key of the lower tone, the interval is Major. If it is a half step higher it is Augmented. If it is a half step lower, the interval is Minor. If it is a whole step lower, the interval is Diminished.

  Consonant Intervals: PUnison, POctave, P5, P4(someti mes) M3, m3, M6, m6
Dissonant Intervals All 2nds, all 7ths, all A, all d, P4(sometimes)

So whats up with the P4? Can it be both Consonant and Dissonant? Indeed it can.

Chord Construction

Triad Quality 5th Quality 3rd Quality
     
Major Perfect Major
minor Perfect minor
diminished diminished (dissonant) minor
augmented augmented (dissonant) Major
Name of chord
Triad Quality
7th Quality
Major
Major
Major
minor
minor
minor
Dominant
Major
minor
diminished
diminished
diminished
half-diminished
diminished
minor
augmented
augmented
Major

1st Species Counterpoint

1st Species Counterpoint Rules Summary:

1. More stepwise motion than leaps
2. dont repeat notes
3. leap of 1,3,5,m6(up), 8va only.
4. Leaps of 5th or greater must be counterbalanced.
4a. No more than 3 consecutive leaps

5. Parallel, Similar, Oblique and Contrary Motion
6. All harmony must be perfect or imperfect consonances
7. No voice crossing, no overlaps
8. 1st interval must be perfect.

9. No Parallel perfect intervals
10. Avoid hidden (direct) perfect intervals
(leaping to perfect intervals in similar motion
11 Avoid open perfect intervals
(leaping from one perfect interval to another in contrary motions)

Procedures of 4 Part Writing

Summary of General Rules for 4 part writing.

 

1. No Parallel Perfect Intervals
2. Parallel perfect 4th OK in upper voices
3. P5 to dim5 OK
4. dim5 to P5 Bad
5. Avoid parallel 5ths in contrary motion (going from close position to open or vice versa)
5. Avoid parallel 8vas in contrary motion (going from close position to open or vice versa)
6. Avoid Overlaps
7. Avoid Hidden P5ths and P8vas

8.  Leading Tones (^7 in Major and +^7 in minor)  Resolve up to the tonic
9.  Dissonance with the bass tends to resolve down
10.  Chordal 7ths are considered dissonant within the chord and tend to resolve down (even if consonant with the bass)

I-V

1.  Authentic Cadence:
When the cadence ends on I i.e. V-I

1. Perfect Authentic Cadence: Soprano ends on Tonic
2. Imperfect Authentic Cadence: Soprano ends on 3rd or 5th scale degree


2. Semi-Cadence:

When the cadence ends on V i.e. I-V

1. Doubling
a.  OK to double any tone of the I chord

b.  Never double the L.T. of the V chord.

c. Never Omit the 3rd. It identifies the quality.

2. I-V-I in minor
a.  When a progression creates an expectation of V-I, the 7th scale degree must be a leading tone and thus, in minor, must be raised.

8. Expaning I and V in 4 parts
a. When expanding i and V in 4 parts, you can have inner voices move in contrary motion as well as similar and oblique. Remember, you can omit the 5th of any chord but never double the leading tone and never omit the 3rd.


I6, V6 & Vii6

I6 and V6

1.  New Possibilities for the Bass
a. The primary function of the I6 and V6 is to expand upon the 1 and V respectively
b. By using less stable bass tones, the I6 and V6 soften the cadential effect.
c. By using the 6-3 position of the I & V chords, we enrich the harmonic capacity of the progression without losing the critical relationship between the tonic and dominant structures. As well, since the bass line can now fall on the 1st and 3rd scale degress for the I chord and the 5th and 7th scale degrees for the V chord, the bass line begins to take on a melodic character of its own.

Make sure you can write correct 4 part harmony for the below examples following all the above rules: Make sure you can handle doing this if you were given just the melody or just the bass with or without figuration.

9b_1
9b_2
9b_3

Vii6

Summary: The Vii6 contains a tritone between the 4th and 7th scale degrees. Normally the 7th will resolve to 1 and the 4th will resolve to 3. However, When Vii6 moves to I6, it is not necessary for the tritone to resolve normally. The 4th Scale degree may move up to 5. If Vii6 moves to I5, the d5 must resolve normally. If Vii6 moves to I5 the A4 may move to a P4 especially when the 2nd scale degree bass is doubled and the doubling moves to the 3rd scale degree. Avoid using a root position Vii5 chord for now.

Make sure you can write correct 4 part harmony for the below examples following all the above rules: Make sure you can handle doing this if you were given just the melody or just the bass with or without figuration.

9b_4
9b_5

V6-5, V4-3, & V4-2

1. Descending Resolution of 4 (7th above the root)
a.    Just as the Vii6 chord contained a tritone in the upper voices between the 4th and 7th scale degrees that had to resolve (most ofter 4 to 3 and 7 to 8), so too does the V7 chord contain the 4th and 7th scale degrees and so too must these scale degrees resolve. As with the Vii6, the most common resolution is 4 to 3 and 7 to 8.

10a_2

2.  V6-5
a. Like the V6 chord, the V6-5 has the leading tone as its bass. However since the 7th of the chord is now present it forms a tritone against the bass and therefore the bass of the V6-5 must resolve upwards to the 1st scale degree. (the exception is when the V6-5 is part of a larger expansion of V)

10a_3

4.  V4-3
a. If we eliminate the root of the V4-3 chord we are left with a Vii6 chord. The V4-3 and Vii6 are very similar in their function and contrapuntal voice leading. Just as we saw that the 2nd scale degree bass of the Vii6 was more stable than the active leading tone bass of the V6 and therefore could move easily to either the 1st scale degree or the 3rd scale degree, so too may the same be said for the bass of the V4-3.

b. Similarly we saw that Vii6 served as a very effective expansion of I since the dissonance of the diminished chord made the chord very active. The same tritone dissonance exists in the V4-3 and a similar resolution will occur

1. The 7th of the V4-3 chord is now consonant against the bass so like the Vii6 chord, when the V4-3 ascends to a I6, the 4th scale degree may resolve upwards.

2. When the V4-3 chord moves as a neighbor to 15 or passes from 16 to 15 the 4th scale degree will resolve down as expected.

10a_4

5.  V4-2
a. With the V4-2 chord we now add a new tone available to our bass: the 4th scale degree. Since that bass tone will always form a dissonance with the leading tone, the bass of a V4-2 will always resolve down.

b. The main function of the V4-2 is as a passing chord from V5 to 16 and
c. As a upper neighbor (complete or incomplete) to 16
d. As an intermediary allowing V7 to fall to 16 via V4-2 (remember V7-16 should be avoided as it results in hidden octaves

10a_5

Intermediary Harmonies

Leading to V: IV, II and II6

READ NOTES 11a very carefully! You need to know everything in these notes. This section contains the most advanced and complex voice leading we have seen so far.

II6
a. In Major both II and II6 move quite easily. In minor, the lowered 6th scale degree creates a diminished triad on II. Like the dimVii6 in Major, the dim II6 satisfactorily leads to V in minor. For now, we will avoid root position II in minor.
b. Since, in minor II6 contains the lowered 6th scale degree and V must contain the raised 7th, leading from II6 to V with the lowered 6th moving to the Leading tone creates an unwanted A2nd. Avoid.
c. The II6 in minor contains the tritone between the 2nd and 6th scale degree. To avoid the aforementioned A2nd the 6th scale degree often resolves to 5. However, since the V chord does not contain the 3rd scale degree, the 2nd scale degree of the II6 cannot ascend to 3. As a result II6-V will often contain a d5 moving to a P5.
d. As an intermediary allowing V7 to fall to 16 via V4-2 (remember V7-16 should be avoided as it results in hidden octaves

Moving to V7
a. IV II and II6 all move well to V7. In fact they all share the 4th scale degree. When this 4th scale degree is present in the same voice in the IV, or II or II6 chord AND in the V7, the dissonance in the V7 is said to be "prepared", Throughout our study of harmony, we will see many benefits to preparing dissonances. When the preparation of the dissonance occurs on a strong beat the preparation is called a "suspension". The strength of the prepared 7th is significant and, at times can warrant its doubling.

I6 leading to IV or II6
a. We have seen that I6 is an expansion of the same tonic harmony as I. Since the role of II, II6 and IV is to lead away from I and towards V, these chords work very well in progression with I6. In addition the 3rd scale degree of the bass I6 lies just a step away from II6 and IV creating very smooth voice leading. Since this bass is just a step away, be very careful of parallel octaves.

Connecting I and V by stepwise bass
a. With the addition of the 4th scale degree that does not represent a dissonance and can rise (remember V4-2 will have a 4th scale degree that falls to I6) we can now harmonize an ascending bass line. Note that V43 or Vii6 can be used to bridge I and I6



Moving to Vii6, V6 and inversions of V7
a.II, II6 and IV can all move easilyt o Vii6, V, V7 and its inversions. Of particular mention is II6 and/or IV moving to V4-2. Since all of these chords contain the 4th scale degree in the bass, such voice leading allows the bass to remain stationary while the upper voices change the harmonic function of the chord. (Play Mozart ex 9-14)

b.When II6 or IV moves to V63 or V65 there will be a upwards jump of an A4 or a downwards jump of a d5. Since the downwards jump of a d5 to the leading tone will be followed by a stepwise ascent to the tonic, the contrary motion helps to offset the dissonance in the bass line.


a. With the addition of II, II6 and IV, we can now harmonize the melodic motion ^5,^6,^7,^8. When harmonizing the leading tone^7, avoid the V or V7 chord as they will tend to lead to parallelisms. Instead use Vii6, V43 or V42 (note V6 and V65 would result in doubled leading tones)



a.Just as I and V can be expanded by I6 and V6 (and reverse), so too can II be expanded by II6 (and reverse)
b. Often a "16" will "Pass" between II and II6. This I6 does not serve a cadential function but simplay acts as a bridge to pass from one chord to the next. I will often refer to the "passing I6" as a "PI6"

c. When the ^1st scale degree of the IV5 chord moves to the ^2 scale degree and all other harmony tones remain constant, the resultan harmony becomes a II6. This is called the 5-6 Technique and is the first of many "sequential expansion techniques we will see in the semesters to come.

d. In minor the progression I-II can yield very stark voice leading and thus is often avoided. However, when used as an expansion of intermediatry harmonies II6 and IV in minor, it can have a rather nice effect. (see Shubert

14 Harmonic Syntax
a. Bass tones of V6, Vii6 and inversions of V7 must lead by step to I or I6 (unless part of an arpeggiation that expands V or V7)
b. Intermediate Harmonies move away from I and towards V, V6, Vii6 or V7 (+inversions) They never follow these chords.
c. Intermediate Harmonies never lead to I
d. Intermediate Harmonies can expand upon themselves.

15 Chord Progressions and Rhythm
a. Dont repeat a chord from a weak beat to a strong one
b. Dont repeat a bass note from a weak beat to a strong one (ie IV-II6) except when the bass functions as a suspension (ie II6 to V42)

16 Subordinate Progressions
a. Since we now can expand 1-V with intermediary harmonies, the aggregate expansion can itself be throught of as a smaller, more localized representation of I or V which can, in turn be expanded. This will become a critical element in the study of musical form. If the localized expansion sounds too cadential, avoid root position I and V.

Cadential 64

Voice Leading
a. As with all other "normal" resolutions of dissonances, the 4th in the Cad64 will resolved down. When it is not held over from the previous harmony, it often enters by stepwise decent as an accented passing or neighbor tone.

Moving to V7 & Doubling.
a. Since the Cad64 is an integral part of the dominant harmony, it moves most naturally to V7 with the ^1 (4th above the bass) resolving down to the leading tone and the ^3 (6th above the bass) resolving down to the ^2 (5th above bass of V7) Sometimes, we will see the ^3 resolve up to the ^4 to create the 7th of the V7. When the ^3 is doubled it is obviously best to have one lead to the ^2 and the other lead to the ^4 to avoid parallelisms. In four part writing, it is best to double the bass (most stable) then the 6th above (consonant). Try to avoid the 4th (dissonant) unless it appears in free or complex textures.

Rhythm
a. Like the suspension of the ^4 in a II/II6/IV - V7 (inv) progression, the suspensions in the Cad64 should occur on a metrically relatively strong beat and resolve on the following weak beat. (or in the case of slow progressions the resolution may occur on the next strong beat)

Moving to V7
a. IV II and II6 all move well to V7. In fact they all share the 4th scale degree. When this 4th scale degree is present in the same voice in the IV, or II or II6 chord AND in the V7, the dissonance in the V7 is said to be "prepared", Throughout our study of harmony, we will see many benefits to preparing dissonances. When the preparation of the dissonance occurs on a strong beat the preparation is called a "suspension". The strength of the prepared 7th is significant and, at times can warrant its doubling.

If the Cad64 were to be preceded by a chord containing the leading tone (variations of V or Vii6) we would spoil the harmonic party created by the delayed resolution to ^7 of the Cad64. Therefore, we will say that the Cad64 is approached only from intermediate harmonies or a tonic chord