用python写一首歌

import wave

import math

import struct

ff=wave.open("v1.wav","w")

ff.setframerate(9000)

ff.setnchannels(1)

ff.setsampwidth(2)

 

 

def wv(t=0,f=0,v=0.5,wf=ff,sr=8000):

    '''

    t:写入时长

    f:声音频率

    v：音量

    wf：一个可以写入的音频文件

    sr：采样率

    '''

    tt=0

    dt=1.0/sr

    while tt<=t:

        s=math.sin(tt*math.pi*2*f)*v*32768 #采样，调节音量，映射到[-2^15,2^15)

        s=int(s)

        fd=struct.pack("h",s) #转换成8bit二进制数据

        wf.writeframes(fd) #写入音频文件

        tt+=dt #时间流逝

 

note={"1":440,"2":493.88,"3":554.37,"4":587.33,"5":659.33,"6":739.99,"7":830.61,"6-":329.63,"0":0}

n=[

    "1","2","3","1","1","2","3","1",

    "3","4","5","0","3","4","5","0",

    "5","6","5","4","3","1","5","6","5","4","3","1",

    "2","6-","1","0","2","6-","1","0"

]

tm=[

    1,1,1,1,1,1,1,1,

    1,1,1,1,1,1,1,1,

    0.5,0.5,0.5,0.5,1,1,0.5,0.5,0.5,0.5,1,1,

    1,1,1,1,1,1,1,1,

]

 

for i in range(len(n)):

    wv(tm[i]/2.0,note[n[i]])

 

ff.close()