昨天无聊发的帖子，没想到深受各位老哥喜欢，很多老哥私信我要代码，在这里重开个帖子讲下原理。

人的耳朵能听到的声音的频率范围大概是20-20000hz。所以对应的就有一个十二平均律表。

那么MATLAB只要把音调和节拍做成一个函数，然后调用就行。

根据菊花台的简谱编写对应的代码就行。

编写音调节拍的函数的m文件的代码如下：

function y = gen_wave(tone,rythm)%音高，节拍Fs = 8192;%采样率freqs = [523,587,659,698,783,880,988,1046,1174,1318,1396,1567,1760,1975,261,293,329,349,391,440,493];%音高 C调的do re mi fa so la xi，以及升调，降调x = linspace(0,2 * pi * rythm,floor(Fs * rythm));y = sin(freqs(tone) * x) .* (1 - x/(rythm * 2 * pi));end

编写菊花台的代码如下：(用mlx实时文件或者m文件都行，我是用的mlx文件编写)

Fs = 8192;xx = linspace(0,2*pi,Fs);yy = sin(xx);%你的泪光柔弱中带伤y1 = gen_wave(3,1);y2 = gen_wave(3,0.5);y3 = gen_wave(2,0.5);y4 = gen_wave(3,1);y5 = gen_wave(3,0.5);y6 = gen_wave(5,0.5);y7 = gen_wave(3,0.5);y8 = gen_wave(2,0.5);y9 = gen_wave(3,2);y = [y1,y2,y3,y4,yy,y5,y6,y7,y8,y9];%惨白的月弯弯勾住过往y1 = gen_wave(1,1);y2 = gen_wave(1,0.5);y3 = gen_wave(2,0.5);y4 = gen_wave(3,0.5);y5 = gen_wave(5,0.5);y6 = gen_wave(3,1);y7 = gen_wave(2,1);y8 = gen_wave(2,0.5);y9 = gen_wave(1,0.5);y10 = gen_wave(2,2);y = [y,y1,y2,y3,y4,y5,y6,y7,y8,y9,y10];%夜太漫长y1 = gen_wave(3,1.5);y2 = gen_wave(5,0.25);y3 = gen_wave(3,0.25);y4 = gen_wave(6,0.5);y5 = gen_wave(5,1.5);y = [y,y1,y2,y3,y4,y5];%凝结成了霜y1 = gen_wave(6,0.5);y2 = gen_wave(5,0.5);y3 = gen_wave(5,0.5);y4 = gen_wave(3,0.5);y5 = gen_wave(5,1.5);y = [y,y1,y2,y3,y4,y5];%是谁在阁楼上冰冷地绝望y1 = gen_wave(5,0.5);y2 = gen_wave(3,1);y3 = gen_wave(2,0.5);y4 = gen_wave(2,0.5);y5 = gen_wave(5,1);y6 = gen_wave(3,0.5);y7 = gen_wave(2,0.5);y8 = gen_wave(2,1);y9 = gen_wave(2,0.5);y10 = gen_wave(1,0.5);y11 = gen_wave(2,2);y = [y,y1,y2,y3,y4,y5,y6,y7,y8,y9,y10,y11];%雨轻轻弹朱红色的窗y1 = gen_wave(3,1);y2 = gen_wave(3,0.5);y3 = gen_wave(2,0.5);y4 = gen_wave(3,2);y5 = gen_wave(3,0.5);y6 = gen_wave(5,0.5);y7 = gen_wave(3,0.5);y8 = gen_wave(2,0.5);y9 = gen_wave(3,2);y = [y,y1,y2,y3,y4,y5,y6,y7,y8,y9];%我一生在纸上被风吹乱y1 = gen_wave(1,1);y2 = gen_wave(1,0.5);y3 = gen_wave(2,0.5);y4 = gen_wave(3,0.5);y5 = gen_wave(5,0.5);y6 = gen_wave(3,1);y7 = gen_wave(2,1);y8 = gen_wave(2,0.5);y9 = gen_wave(1,0.5);y10 = gen_wave(2,2);y = [y,y1,y2,y3,y4,y5,y6,y7,y8,y9,y10];%梦在远方化成一缕香y1 = gen_wave(3,1.5);y2 = gen_wave(5,0.25);y3 = gen_wave(3,0.25);y4 = gen_wave(6,0.5);y5 = gen_wave(5,1.5);y6 = gen_wave(6,0.5);y7 = gen_wave(5,0.5);y8 = gen_wave(5,0.5);y9 = gen_wave(3,0.5);y10 = gen_wave(5,2);y = [y,y1,y2,y3,y4,y5,y6,y7,y8,y9,y10];%随风飘散你的模样y1 = gen_wave(3,0.5);y2 = gen_wave(2,0.5);y3 = gen_wave(3,0.5);y4 = gen_wave(5,1);y5 = gen_wave(3,0.5);y6 = gen_wave(2,0.5);y7 = gen_wave(2,0.5);y8 = gen_wave(1,1.5);y = [y,yy*0.5,y1,y2,y3,y4,y5,y6,y7,y8];%菊花残满地伤你的笑容已泛黄y1 = gen_wave(1,0.5);y2 = gen_wave(2,0.5);y3 = gen_wave(3,1);y4 = gen_wave(3,0.5);y5 = gen_wave(5,0.5);y6 = gen_wave(6,1);y7 = gen_wave(6,0.5);y8 = gen_wave(3+7,0.5);y9 = gen_wave(3+7,0.5);y10 = gen_wave(2+7,0.5);y11 = gen_wave(1+7,0.5);y12 = gen_wave(6,0.5);y13 = gen_wave(5,2);y = [y,yy*4,y1,y2,y3,y4,y5,y6,y7,y8,y9,y10,y11,y12,y13];%花落人断肠我心事静静淌y1 = gen_wave(6,0.5);y2 = gen_wave(5,0.5);y3 = gen_wave(3,0.5);y4 = gen_wave(2,0.5);y5 = gen_wave(1,1);y6 = gen_wave(6,0.5);y7 = gen_wave(1,0.5);y8 = gen_wave(2,1);y9 = gen_wave(2,0.5);y10 = gen_wave(1,0.5);y11 = gen_wave(2,2);y = [y,y1,y2,y3,y4,y5,y6,y7,y8,y9,y10,y11];%北风乱夜未央你的影子剪不断y1 = gen_wave(1,0.5);y2 = gen_wave(2,0.5);y3 = gen_wave(3,1);y4 = gen_wave(3,0.5);y5 = gen_wave(5,0.5);y6 = gen_wave(6,1);y7 = gen_wave(6,0.5);y8 = gen_wave(3+7,0.5);y9 = gen_wave(2+7,0.5);y10 = gen_wave(1+7,0.5);y11 = gen_wave(1+7,0.5);y12 = gen_wave(2+7,0.5);y13 = gen_wave(1+7,2);y = [y,y1,y2,y3,y4,y5,y6,y7,y8,y9,y10,y11,y12,y13];%徒留我孤单在湖面成双y1 = gen_wave(5,1);y2 = gen_wave(5,0.5);y3 = gen_wave(3,0.5);y4 = gen_wave(7,0.5);y5 = gen_wave(1+7,0.5);y6 = gen_wave(1,0.5);y7 = gen_wave(2,0.5);y8 = gen_wave(3,2);y9 = gen_wave(2,2);y10 = gen_wave(1,4);y = [y,y1,y2,y3,y4,y5,y6,y7,y8,y9,y10];sound(y,Fs);

具体的原理，可以看b站up主“正月点灯笼”的这个视频怎么用MATLAB生成一段音乐