Thursday, March 17, 2011

the purpose of harmony


The most memorable part of a song, the part which we hum along with and allows us to identify a piece, is the melody. A melody is made up of different component of a sound; high, medium or low, and notes are used to convey the different pitches. The distance between two notes is called an interval, and the range is the distance between the highest and lowest notes of a melody. Most melodies are sung using a comfortable range of ten notes or less.
The word conjunt is used to describe melodies that move mostly in steps, and a disjunct melody contains frequent leaps and changes in direction.

Melodies are often built upon a motive- a short melodic/rhythmic fragment used in within a melody. One of most famous examples of a motive is the first fout notes of Beethoven's Fifth Symphony. the famous "three shorts and a long" that open the symphony are developed and appear throught the four movements of the work.
A longer musical 'sentence' is called a phrase and is a series of notes that is a more complete musical idea. the phrase was first developed in singing so that the singer could take a breath in an approprite place. A curved line under or over the notes indicates the lengthof the phrase. A cadence consists of two chords at the end of a phrase and serves as a resting place, or type of musical pumctuation.

Harmony is used to support the melody and is viewed vertically, whereas a melody is a horizontal line. Think of a cake, where the icing is the melody, but the actual cake that supports the icing is the harmony. The harmony provides the structure in music, changing when the melody does. A chord is a combination of two or more pitches which creates a unit of harmony. A common combination is the triad consisting of a root, third, and fifth. the term harmonic rhythm describes the rate of chord changes per measure.
Diatonic means the mucis is built from the notes of a major or minor scale, whereas chromatic music includes all 12 notes available withint the octave.
Furthermore, a combination of tones that provides a sense of relaxation ans stability is described as consonance, versus dissonance for tones that sound dicordant, creating restlessness and tension in the music.

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