Question

我想用sounddevice录制一个音调，我创建numpy并将其写入wav文件。这是代码：

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)

我收到此错误：只有length-1数组可以转换为Python标量代码有什么问题？我是python的新手

Answer 1

你的倒数第二行是

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

您尝试将result1等变量的总和转换为整数。但是，它们实际上是numpy数组，因为time是一个数组。您无法将数组转换为单个整数，因为它具有多个值。我不确定你为什么要这样做，你可能只想删除int()，然后将其更改为

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

Answer 2

sd.rec()用于记录来自声音设备的声音并输出阵列。它期望记录应该持续多长时间的整数。这就是为什么它抛出"TypeError: 'list' object cannot be interpreted as an integer"的原因。 https://python-sounddevice.readthedocs.io/en/0.3.7/#recording

您不必记录数据，因为您已经有了数据（您的结果变量）。所以你应该更换

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

使用

mydata = result + result2 + result3 + result4

在python3中使用sounddevice和numpy编写wav文件

2 个答案: