鸿蒙HarmonyOS开发板提前祝大家新年好！-鸿蒙开发板教程

直接上学习链接：https://mp.weixin.qq.com/s/32KI7H_ASYNOwH-P7FjbRA

https://harmonyos.51cto.com/posts/1511

综合以上2个链接和这个图来改的新年好，(这个图对我帮助很大，我不懂音乐，按照这图改的频率)大家想改其他音乐，建议首先看看开头的2个链接的文章!

感觉还是不太完美。下面吧源码共享出来。大家可以完善完善。。

钢琴上88按键的频率如下表所示：

然后对应到代码中：

float pitch_names_frequency[] = { 
    //0--A0 
    27.50/*A0*/,29.14/*A#0*/,30.87/*B0*/, 
    //3--C1 
    32.70/*C1*/,34.65/*C#1*/,36.71/*D1*/,38.89/*D#1*/,41.20/*E1*/,43.65/*F1*/,46.25/*F#1*/,49.00/*G1*/,51.91/*G#1*/,55.00/*A1*/,58.27/*A#1*/,61.74/*B1*/, 
    //15--C2 
    65.41/*C2*/,69.30/*C#2*/,73.42/*D2*/,77.78/*D#2*/,82.41/*E2*/,87.31/*F2*/,92.5/*F#2*/,98.00/*G2*/,103.8/*G#2*/,110.0/*A2*/,116.5/*A#2*/,123.5/*B2*/, 
    //27--C3 
    130.8/*C3*/,138.6/*C#3*/,146.8/*D3*/,155.6/*D#3*/,164.8/*E3*/,174.6/*F3*/,185.0/*F#3*/,196.0/*G3*/,207.6/*G#3*/,220.0/*A3*/,233.1/*A#3*/,246.9/*B3*/, 
    //39--C4 
    261.6/*C4*/,277.2/*C#4*/,293.7/*D4*/,311.1/*D#4*/,329.6/*E4*/,349.2/*F4*/,370.0/*F#4*/,392.0/*G4*/,415.3/*G#4*/,440.0/*A4*/,466.2/*A#4*/,493.9/*B4*/, 
    //51--C5 
    523.2/*C5*/,554.4/*C#5*/,587.3/*D5*/,    622.2/*D#5*/,659.3/*E5*/,698.5/*F5*/,740.0/*F#5*/,784.0/*G5*/,830.6/*G#5*/,880.0/*A5*/,932.3/*A#5*/,987.8/*B5*/, 
    //63--C6 
    1046/*C6*/,1109/*C#6*/,1175/*D6*/,1245/*D#6*/,1319/*E6*/,1397/*F6*/,1480/*F#6*/,1568/*G6*/,1661/*G#6*/,1760/*A6*/,1865/*A#6*/,1976/*B6*/, 
    //75--C7 
    2093/*C7*/,2217/*C#7*/,2349/*D7*/,2489/*D#7*/,2637/*E7*/,2794/*F7*/,2960/*F#7*/,3136/*G7*/,3322/*G#7*/,3520/*A7*/,3729/*A#7*/,3951/*B7*/, 
    //87 
    4186/*C8*/ 
};

接着找出每个音的频率

#define L_B 51   
#define N_B 63   
#define H_B 75   
 
 
unsigned char ai_ruo_liu_li[] = { 
    N_B+0,N_B+0,N_B+0,N_B+7,  N_B+4,N_B+4,N_B+4,N_B+0, 
    N_B+0,N_B+4,N_B+9,N_B+9,  N_B+5,N_B+4,N_B+2, 
    N_B+2,N_B+4,N_B+5,N_B+5,  N_B+4,N_B+2,N_B+4,N_B+0, 
    N_B+0, N_B+4,N_B+2,N_B+0, L_B+11,N_B+2,N_B+0, 
};

然后根据简谱确定时长：

unsigned char music[]={ 
 
2,2,4,4, 2,2,4,4, 
 
2,2,4,4, 2,2,8, 
 
2,2,4,4, 2,2,4,4, 
 
2,2,4,4, 2,2,8, 
 
};

第一句最后一个5.的音，换了好几个频率。总感觉不太对劲

我写的还是不太对，多有不足。请大家指正!

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视频链接：https://harmonyos.51cto.com/show/2355

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