在python3中使用sounddevice和numpy编写wav文件

Question

我想用我创建的numpy声音设备录制音调并将其写入wav文件。代码如下：

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)

我得到这个错误：只有length-1数组可以转换成Python标量 密码怎么了？我是python的新手

Answer 1

你倒数第二行是

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

尝试将result1等变量的和转换为整数。但是，它们实际上是numpy数组，因为time是一个数组。不能将数组转换为单个整数，因为它有多个值。我不知道您为什么要这样做，您可能只想删除int()，并将其更改为

^{pr2}$