In music practice, the measure of a piece of music starting from a weak beat or weak position is called a weak attack measure. A weak attack music starts from a weak beat or weak position, which is called a weak attack. The part before the first bar line is called a weak attack bar. It is also said that the section starting from a weak beat or a sub-strong beat is called a weak attack bar (or called a weak attack). incomplete section). The final ending measure of a song (music) with a weak starting measure is often incomplete, and the number of beats added together is exactly equivalent to a complete measure.

The music starts from the weak part of the beat (the weak beat or the second half of the beat), which is called "weak attack music" or "weak attack". The part before the first bar line of a soft attack piece is called the "soft attack measure". The weak attack can be used both in the music and in the phrases in the middle of the music, which is called "the weak attack phrase".

Weakly started sections are incomplete sections or incomplete sections. A piece of music that starts with an incomplete measure usually ends with an incomplete measure. The sum of these two incomplete measures equals a complete measure. When counting the number of measures in a piece of music, it starts from the first complete measure.