What does the strength of notes mean in music theory? Let’s talk about it with a song.

That is, intensity, refers to the collective name for all things related to the volume in music score or performance (singing). Such as crescendo and decrescendo symbols (＜) (＞), dynamic terms (p, mp, mf, f), as well as expressions and gestures when singing and performing, etc. For example, the piano version of "Mountain Flowers Bloom Red" has a three-section structure, with an introduction and an ending. ①The introduction part has a freer rhythm and depicts the scene of Shandan flowers being beautiful and moving in the sunshine when the morning light dews on the northern Shaanxi Plateau, and the dewdrops on the petals trembling gently in the breeze. When playing, the notes marked with sustain marks should be highlighted, and the crescendo, decrescendo, and changes in speed and intensity should be made. ② In the first part from bars 9 to 31, the melody of the right hand should be clear and full, and the sentences should be coherent. Pay attention to the contrast between strong and weak, and fully reflect the simple and affectionate characteristics of northern Shaanxi folk songs. ③In the middle section, there begins with a warm and short interlude, showing a happy scene with powerful jumping notes. Then the cheerful theme changes appear four times, in the right hand treble part, in the left hand, and twice in transitional sentences. You can use strong and weak light and dark to highlight the theme and melody. ④Bars 141 to 151 are the climax of the whole song. The melody of the right hand should be full and the flow of the left hand should be clear. People seem to see the dawn of victory and move forward with confidence! ⑤The epilogue is from section 152 to the end. The music ends with the sweet voice of a soprano slowly receding.