Question

我目前正在尝试用Python生成声音，我很好奇我如何采用表示波形的n数组（采样率为44100 hz）并播放它。我在这里寻找纯Python，而不是依赖于支持多种.wav格式的库。

Answer 1

您应该使用库。在纯python中编写所有内容可能需要数千行代码才能与音频硬件连接！

使用库，例如audiere，它将如此简单：

import audiere
ds = audiere.open_device()
os = ds.open_array(input_array, 44100)
os.play()

还有pyglet，pygame和许多其他..

Answer 2

播放16位采样数组 input_array 的声音。这是pyadio documentation page

的修改示例

import pyaudio

# instantiate PyAudio (1)
p = pyaudio.PyAudio()

# open stream (2), 2 is size in bytes of int16
stream = p.open(format=p.get_format_from_width(2),
                channels=1,
                rate=44100,
                output=True)

# play stream (3), blocking call
stream.write(input_array)

# stop stream (4)
stream.stop_stream()
stream.close()

# close PyAudio (5)
p.terminate()

Answer 3

或使用sounddevice模块。使用pip install sounddevice安装，但您首先需要：sudo apt-get install libportaudio2

绝对基本：

import numpy as np
import sounddevice as sd

sd.play(myarray) 
#may need to be normalised like in below example
#myarray must be a numpy array. If not, convert with np.array(myarray)

还有一些选择：

import numpy as np
import sounddevice as sd

#variables
samplfreq = 100   #the sampling frequency of your data (mine=100Hz, yours=44100)
factor = 10       #incr./decr frequency (speed up / slow down by a factor) (normal speed = 1)

#data
print('..interpolating data')
arr = myarray

#normalise the data to between -1 and 1. If your data wasn't/isn't normalised it will be very noisy when played here
sd.play( arr / np.max(np.abs(arr)), samplfreq*factor)

Answer 4

我想你可能看一下这个清单 http://wiki.python.org/moin/PythonInMusic 它列出了许多用于处理声音的有用工具。

Answer 5

这是摘自this stackoverflow answer的一小段代码，还有一个播放numpy数组（已载入scipy的声音文件）的示例：

from wave import open as waveOpen
from ossaudiodev import open as ossOpen
from ossaudiodev import AFMT_S16_NE
import numpy as np
from scipy.io import wavfile

# from https://stackoverflow.com/questions/307305/play-a-sound-with-python/311634#311634
# run this: sudo modprobe snd-pcm-oss
s = waveOpen('example.wav','rb')
(nc,sw,fr,nf,comptype, compname) = s.getparams( )
dsp = ossOpen('/dev/dsp','w')

print(nc,sw,fr,nf,comptype, compname)

_, snp = wavfile.read('example.wav')
print(snp)

dsp.setparameters(AFMT_S16_NE, nc, fr)
data = s.readframes(nf)
s.close()

dsp.write(snp.tobytes())
dsp.write(data)
dsp.close()

基本上，您可以只调用tobytes（）方法；然后可以播放返回的字节数组。

P.S。这种方法非常快速

从存储在阵列中的波形播放声音

5 个答案: