The broken bow uses the tension of the muscles of the forearm to make the wrist obtain a free and elastic trembling motion, thus pulling the bow back and forth on the piano barrel rapidly, causing a small section of bow hair to frequently rub the strings, thus making a tight sound. Crunchy sound.

Playing a short bow is accomplished by commanding the wrist to perform rapid flexion and extension while the forearm remains loose and natural. Playing a broken bow is to use the tension of the muscles of the forearm to make the wrist obtain a kind of free and elastic trembling motion. Scrub the strings frequently, resulting in a tight, crumbly sound. So some people call this broken bow with trembling action "shaking bow" or "shaking bow".

Broken bows are marked with specific symbols. Notes with a duration of more than one beat are marked with a three-prime parallel oblique line like "彡" at the lower right end of the note; notes with a duration of less than half a beat are marked with a corresponding oblique stroke on the "minus time line". Wire. For example "5356", the sound effect of playing with a broken bow is roughly "55555555 33335566". If the entire passage requires broken bows to be played, do not mark any symbols in the score, but use text to indicate where the broken bows start and end.

When playing the broken bow, in order to have some control over the tremor of the wrist, in addition to the conscious tension of the upper arm, the lower arm is also slightly raised, and at the same time, the bow is moved to the place close to the tip of the bow, and the bow that is close to the tip of the bow is used. Section rubbing strings. In this way, the uniformity and continuity of broken bow pronunciation can be easily solved. Of course, the left half bow or the middle bow can also be used to play the broken bow, but the skill of the right hand bow is more demanding.

It should be pointed out that the local tension of the muscles of the forearm when playing the broken bow has a certain relationship with the tremor of the wrist. It can ensure that the forearm has a lasting "internal strength", making the tremor of the wrist appear more active and rhythmic. . If we regard the tension of the forearm muscles as a stalemate and use the irregular tremors of the wrists entirely, it is impossible to produce a crisp and dense bow breaking effect.