Eli5: Music theory: Why do we have certain time signatures?

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If signature does not denote tempo, why do we need signatures like 2/4 or 6/8? Why can’t the music just be written in 4/4 or 3/4?

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Anonymous 0 Comments

Signature isn’t for tempo, signature is to tell you;

1) What kind of note denotes a single “beat,” and;

2) How many beats you have per measure, as well as (generally) what beats should be emphasized.

>2/4 or 6/8? Why can’t the music just be written in 4/4 or 3/4?

Because theses actually mean different things, even if they’re “mathematically” equivalent at first glance.

2/4 time would denote that the first beat gets emphasis. 4/4 time denotes that the 1st and 3rd beats get emphasis, but that the 3rd gets less emphasis.

3/4 and 6/8 are also different; 3/4 time denotes that the 1st beat gets emphasis, whereas 6/8 time denotes that the 1st and 4th beats get emphasis, with the 4th beat having less emphasis.

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