What do you mean by four or two beats? Can it also be pronounced as two beats or four beats? why

In music, the symbols used to represent different beats are called beats. The time signature is expressed in the form of a fraction, where the denominator represents the beat with fractional notes as the unit (that is, the basic time value of the unit beat) and the numerator represents how many unit beats there are in each bar. In the staff, the score line is replaced by the third line, and there is no need to draw another line.

The reading method of time signature is to read the denominator first, then the numerator, and the fractional line need not be read. So it's not two or four beats pronunciation.

Or symbolic.

It means that the quarter note is taken as one beat, and each bar is taken twice. Reading: Four or two beats.

Extended data:

trifle

In music, the part between one beat and the next is a bar.

Every two bars are separated by a vertical line, which is called a bar line. The function of the bar line is to write in front of the strong beat as a sign of the strong beat. In other words, everything behind the bar line must be a strong beat.

Bar lines are generally solid lines, and in some cases, they can also be dotted lines (for example, when used in casual shooting and mixed shooting). The parallel bars line, also called multiple vertical lines or paragraph lines, represents a piece of music. Two vertical lines, one thin and one thick, are called termination lines, indicating the end of music.

Weak strip

Music starts from the weak part of the beat (weak beat or the second half beat), which is called "weak music" or "weak music". The part before the first bar line of weak music is called "weak node". The weak rise can be used for both music and phrases in the middle of music, which is called "weak rise phrase".

The weak segment belongs to incomplete segment or incomplete segment. A piece of music that begins with an incomplete bar usually ends with an incomplete bar, and the sum of these two incomplete bars equals a complete bar. When counting the number of bars in a piece of music, start with the first complete bar.