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Textbook of Gregorian Chant (1930) - MusicaSacra

Textbook of Gregorian Chant (1930) - MusicaSacra

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16 Part One.<br />

Perfect Fourth.<br />

lone tone senii-t. tone semi-t. tone semi-t. tone tone<br />

When the interval <strong>of</strong> a fourth takes in three successive tones it<br />

becomes what is called an augmented fourth or tritone.<br />

I.<br />

p<br />

k mi<br />

k<br />

a.<br />

m i<br />

- •<br />

a.<br />

m •<br />

• i<br />

11-<br />

hr-_ *<br />

a. t.<br />

t.<br />

i<br />

1<br />

a*<br />

i<br />

1<br />

m<br />

I<br />

- •<br />

t<br />

Augmented Fourth.<br />

tone tone tone<br />

• "<br />

•<br />

a. t.t.<br />

-•<br />

" 1<br />

L<br />

a. t.<br />

• • .<br />

•<br />

t.<br />

"• 1 1<br />

1<br />

1<br />

m " '<br />

1<br />

' " • 1<br />

• . I<br />

I<br />

t. t. a. t.<br />

I

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