在python3中使用sounddevice和numpy編寫wav文件

Question

我想用創建numpy的sounddevice錄製音調並將其寫入wav文件。這裏是代碼：

import numpy 
import sounddevice as sd 
import soundfile as sf 
import sys 

duration = 3 
amplitude = 0.3 
sampling_frequency = 44100 

time = numpy.arange(int(numpy.ceil(duration * sampling_frequency)))/ sampling_frequency 

frequency1 = 500 
tone1 = amplitude * numpy.sin(2* numpy.pi * frequency1 * time) 

frequency2 = 700 
tone2 = amplitude * numpy.sin(2* numpy.pi * frequency1 * time) 
frequency3 = 1500 
tone3 = amplitude * numpy.sin(3* numpy.pi * frequency1 * time) 
frequency4 = 400 
tone4 = amplitude * numpy.sin(4* numpy.pi * frequency1 * time) 

result = tone1 
result2 = tone2 
result3 = tone3 
result4 = tone4 

sd.play(result + result2 + result3 + result4, sampling_frequency) 

filename = 'output.wav' 

mydata = sd.rec(int(result + result2 + result3 + result4),sampling_frequency,channels=2, blocking=True) 
sf.write(filename, mydata, sampling_frequency) 

我得到這個錯誤：只有長度爲1的陣列可以轉換到Python標量 有什麼不好的代碼？我與蟒蛇一個新手

Answer 1

你的第二個到最後一行是

mydata = sd.rec(int(result + result2 + result3 + result4),sampling_frequency,channels=2, blocking=True) 

如果您嘗試result1等變量的總和強制轉換爲整數。但是，它們實際上是numpy數組，因爲time是一個數組。您不能將數組轉換爲單個整數，因爲它具有多個值。我不知道爲什麼你正在嘗試做的，你可能只是想刪除int()，並將其更改爲

mydata = sd.rec(result + result2 + result3 + result4, sampling_frequency, channels=2, blocking=True)