noun
dynamics mark; dynamics marking
In music notation, a symbol indicating the loudness or softness of a passage, such as p, f, cresc., or dim.
楽譜の強弱記号に従って演奏してください。
Please perform according to the dynamics markings in the score.
速度記号 refers to tempo markings (e.g., allegro, andante), while 強弱記号 refers specifically to dynamics markings.
Compound of 強弱 (kyōjaku, 'strength and weakness; dynamics') and 記号 (kigō, 'symbol; mark').