Formal functions and Musical texture
Part I - Formal functions
Six basic functions of phrase structure can be identified They are:
- expository
- transitional
- delopmental
- introductory
- closing
- parenthetical
Transitional phrases- Transitional phrases function as links between expository phrases. as an example, the transition part of a sonata, which we will talk about tomorrow would be a transitional phrase.
Developmental function- Closely related to the transitional function, this type of phrase does not introduce new material, it just develops material introduced in the expository phrase.
Introductory function- Occurs in passages that initiate a phrase, section, or movement.
Closing function- Occurs in phrases that bring a section or movement to a final cadence. often include pedal tones, reiteration of thematic material, and/or rhythmic acceleration or deceleration.
Parenthetical function- contain an unexpected change in tonality, theme, or texture. It can also contain sudden changes in dynamics. All of this gives a sense of a parenthetical aside or interjection.
Part II - Musical texture and form
Musical texture refers to the arrangement and quality of sounds in music.
Types of musical texture:
Monophony- a single line of music. all voices are moving in unison at the same time. Gregorian chant is an example of monophony.
Polyphony- Many different lines that are rhythmically pendant of each other and hold equal importance.
Homophony- where the melody is presented in one voice and the other instruments are chordal accompaniment.
Heterophony- contains different elaborations of the same basic melody.
