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Music dictionary in the stories. The Letter T


If you look in the notes of any indifferent to one instrument or several notes of romance or an orchestral score, you will see that musical lines in them are separated by vertical lines:

Musical clock

These lines, called a clock feature that separates one step from another. And tact (from Latin tactus touch, impact) so is one piece of music, which is enclosed between two clock features.

Put these traits do not haphazardly, but in a completely particular order: before strong shock degree of melody. Thus, the number of beats per measure is different depending on its size. Thus, the size of Vals - three quarters. This means that a shock it is, each of the first three quarter of the shares. In each step of the waltz will be exactly three quarters. And polka, for example, dicotyledonous dance. And in each step polka contains two quarters.

The size of the quantum is represented by a number, in which the top number indicates the number and the lower the duration of the shares that make up the beat. For example, 2/4, 3/8, etc.

The size of the quantum is set at the beginning of the work.

The size of the stroke

The bars may be not only simple, with the same emphasis, but also complex. Compound measures, size 6/8, 1/9, 4/4 and have several other similar stress one important thing, the most powerful, on the first beat of the measure; the other or others, if they are more on the relative strengths shares inside tact.

Cycles are symmetric (in 2/4, 6/8, etc.,) and unbalanced, not only in 3/4 or 3/8, but such as 5/4, 5/8 and others.

There are quite rare, unique sizes tact. So, in the finale of the Opera "the snow maiden" by Rimsky-Korsakov wrote the chorus of Slovenia God yarily the Sun to the size of a bar of 11/4.

Music dictionary in stories
Printed materials of the eponymous book by L. Mikheeva (Moscow, "Soviet composer", 1984)

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