G DeBenedetti www.gmajormusictheory. org & # Pathways to Harmony Chapter 4: Half and whole steps, major scales and the circle of fifths 4.5 Choosing Keys with the Circle of Fifths
Jan 10, 2016
G DeBenedettiwww.gmajormusictheory.org
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Pathways to Harmony
Chapter 4: Half and whole steps, major scales and the circle of fifths
4.5 Choosing Keys with
the Circle of Fifths
&#So what does the circle of fifths
have to do with real music?
• In presentations 4.5 and 4.6 we will see and hear how the circle of fifths is used…
&#So what does the circle of fifths
have to do with real music?
• In presentations 4.5 and 4.6 we will see and hear how the circle of fifths is used… – to change keys in the middle of a piece (4.5)
&#So what does the circle of fifths
have to do with real music?
• In presentations 4.5 and 4.6 we will see and hear how the circle of fifths is used… – to change keys in the middle of a piece (4.5)– to choose chords in folk and popular music (4.6) and
&#So what does the circle of fifths
have to do with real music?
• In presentations 4.5 and 4.6 we will see and hear how the circle of fifths is used… – to change keys in the middle of a piece (4.5)– to choose chords in folk and popular music (4.6) and – to choose chords in classical music and in jazz (4.6)
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• Composers often use more than one scale, or key, as the basis for a particular piece.
Moving to a new key
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• Composers often use more than one scale, or key, as the basis for a particular piece.
• After the first key is established, the composer must decide which key to move to.
Moving to a new key
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• Composers often use more than one scale, or key, as the basis for a particular piece.
• After the first key is established, the composer must decide which key to move to.
• The new key is usually chosen on the basis of the circle of fifths.
Moving to a new key
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• Composers often use more than one scale, or key, as the basis for a particular piece.
• After the first key is established, the composer must decide which key to move to.
• The new key is usually chosen on the basis of the circle of fifths.
• Usually the composer chooses the key next to the original one on the circle moving clockwise.
Moving to a new key
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• For instance, a piece may begin by using notes from a B-flat scale. That is, it's in the key of B-flat.
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• For instance, a piece may begin by using notes from a B-flat scale. That is, it's in the key of B-flat.
• If the piece is long enough the composer may start using notes from a new scale. That scale will often be the one of the next key moving clockwise, F.
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• For instance, a piece may begin by using notes from a B-flat scale. That is, it's in the key of B-flat.
• If the piece is long enough the composer may start using notes from a new scale. That scale will often be the one of the next key moving clockwise, F.
• These scales differ by only one note, and their similarity may explain why they are so often used together in the same piece.
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• In the first section of the piece on the next slide, Rameau used notes from the C scale--there are no sharps and flats.
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• In the first section of the piece on the next slide, Rameau used notes from the C scale--there are no sharps and flats.
• In the second section, Rameau repeated the music exactly, except
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• In the first section of the piece on the next slide, Rameau used notes from the C scale--there are no sharps and flats.
• In the second section, Rameau repeated the music exactly, except – the music shifts up five notes in the top staff and
down four notes in the bottom staff, and
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• In the first section of the piece on the next slide, Rameau used notes from the C scale--there are no sharps and flats.
• In the second section, Rameau repeated the music exactly, except – the music shifts up five notes in the top staff and
down four notes in the bottom staff, and – the notes are taken from the G scale--all F’s are
sharp.
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• In the first section of the piece on the next slide, Rameau used notes from the C scale--there are no sharps and flats.
• In the second section, Rameau repeated the music exactly, except – the music shifts up five notes in the top staff and
down four notes in the bottom staff, and – the notes are taken from the G scale--all F’s are
sharp.
• So Rameau moved from the key of C, at the top of the circle, to the key of G, moving clockwise by one key.
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• Section one:– Key of C
• Section two:– Key of G,
• At the end of the page the piece goes back to section one.
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• Section one:– Key of C
• Section two:– Key of G,
• At the end of the page the piece goes back to section one.
• PLAY the piece
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Now it's your turnUSE a copy of the circle of fifths to answer the
following question. WRITE down your answers. Correct answers are on the next slide.
If a piece changes key, NAME the likely new key if the original key was
a. E
b. D-flat
c. F