Discuss the Development Section of Beethoven's Symphony No. 1 in C Major

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The first movement of Beethoven's 1st symphony is in sonata form made up of an exposition including a 1st and 2nd subject, transition and codetta motifs from which will be explored often in unrelated keys within the development section. The development can be seen to be divided into 4sections. The 1st section of the development (bar 110-135) features rapid modulation through a cycle of 5ths. At bar 110 following a descending G7 in the 2nd time bar, the key suddenly moves to an A major chord in its 1st inversion (a tertiary relation to the tonic key of C). The initial melody idea in the development is the dotted quaver-semiquaver motif taken from bar 14-15 of the exposition section. In bars 112-113 there are diminished 7th chords taken from the 2nd subject of the exposition (bar65-66), these diminished 7ths lead us into D major (bar 114). In bar 116-117 diminished 7ths are used again to take us to G major for bars 118. Diminished 7th chords used again in bar 120-121 which takes us to the key of C minor for bars 122-125. The rapid modulation continues throughout the 1st section still going round the cycle of 5ths moving to F minor (bar 126-129), Bb major (bar 130-131), Eb major (bar 132-133), then Eb minor (134-135) and finally resolves onto the unrelated key of Bb major for the second section of the development. The rising crotchet arpeggio motif first used in bar 176 is used throughout bars 125-135. All of the keys explored the 1st section make it harmonically unstable. The 2nd section (bars 136-143) is in Bb major throughout making it harmonically stable. This section is based upon the repeated quaver motif taken from bar 45 with the motif played only in the string section (bars 138-140). A descending Eb major scale is played in bar 143 to end the 2nd section and take us into the 3rd section of the development. The 3rd section (bar 144-160) features another

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