Musical structure is usually defined by several things including scales and/or arpeggios , rhythm, key signature, melodic patterns, variations Etc. To keep this particular paragraph concise, all or some of the elements of music theory can be used in the structure of a musical piece. Many composers that listen to Bach are fascinated by the palindromes, variations and inversions of patterns contained in its compositional structure, most of which will never be noticed unless you plan on going through the notation with a magnifying glass.
--Subnote, Colhsh: Musical Structure also refers to the overall layout of a musical work as a whole, these come in several forms the simplest form is Binary form, in which there is one section of music "A" which is then juxtaposed against a contrasting "B" section which finishes it, giving the piece an "A-B" structure. An expansion on this is ternary form which is the same as binary, except that the "A" section is repeated, making the overall structure "A-B-A"
Another musical form that was popular during the classical era is that of the Rondo form, in which there is an "A" section that is repeated throughout the work, but is interrupted by contrasting episodes, making any work in a random form typically have the structure of "A-B-A-C-A-D-Etc."
Larger structures include "Sonata form," which was developed in the Classical Period. The "Sonata form" often is the structure of the first movement of a Sonata, Symphony, and Concerto. The Sonata form is comprised of four sections.
Exposition - Introduces a main theme in the tonic key, and a subordinate theme in a related key - often the dominant, or if in a minor key - the relative major.
Development - Develops and elaborates the themes and explores new and exciting key centers.
Recapitulation - Returns to the tonic key and states the main theme and subordinate theme. The subordinate theme is often reworked to stay in the tonic.
Coda - Concludes the piece.
--Subnote, Colhsh: Musical Structure also refers to the overall layout of a musical work as a whole, these come in several forms the simplest form is Binary form, in which there is one section of music "A" which is then juxtaposed against a contrasting "B" section which finishes it, giving the piece an "A-B" structure. An expansion on this is ternary form which is the same as binary, except that the "A" section is repeated, making the overall structure "A-B-A"
Another musical form that was popular during the classical era is that of the Rondo form, in which there is an "A" section that is repeated throughout the work, but is interrupted by contrasting episodes, making any work in a random form typically have the structure of "A-B-A-C-A-D-Etc."
Larger structures include "Sonata form," which was developed in the Classical Period. The "Sonata form" often is the structure of the first movement of a Sonata, Symphony, and Concerto. The Sonata form is comprised of four sections.
Exposition - Introduces a main theme in the tonic key, and a subordinate theme in a related key - often the dominant, or if in a minor key - the relative major.
Development - Develops and elaborates the themes and explores new and exciting key centers.
Recapitulation - Returns to the tonic key and states the main theme and subordinate theme. The subordinate theme is often reworked to stay in the tonic.
Coda - Concludes the piece.
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