Music 15 - Ch.37 Musical Systems
Terms
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- Octave
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The interval between two tones with the same name that are seven diatonic pitches apart, 12 chromatic half steps.
String half as long will vibrate twice as fast - octave higher
String twice as long will vibrate half as fast - octave lower. - Half step
- How the twelve tones of the octave are divided in western music.
- Chromatic Scale
- Twelve tones of the octave divided by half steps.
- Sharp
- To raise a tone by a half step.
- Flat
- To lower a tone by a half step.
- Key
- A group of related tones that revolve around the tonic to which they gravitate.
- Major Scale
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Diatonic scale
seven tones
do<re mi<fa sol<la ti>do
1, 1,1/2,1, 1, 1,1/2 steps - Mode
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The pattern of whole and half steps between any key of scale.
Major mode - w,w,h,w,w,w,h
Minor mode - w,h,w,w,h,w,w - Minor Scale
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Diatonic scale
Its third degree is half step lower.
1, 1/2, 1, 1, 1/2, 1, 1 steps - Pentatonic Scale
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Other cultures divide the octave differently.
This is the most common.
Octave divided into FIVE-notes. - Microtones
- Intervals smaller than a half step.
- Ragas
- Scale for the music of India, contains certain pitches that are heard only in one direction.