使用 Python [摘要] 读取 wav 文件的最简单方法是什么?

问题描述

我想使用 Python 访问 wav 文件并以允许我分析它的形式写入其内容(比如数组).

I want to use Python to access a wav-file and write its content in a form which allows me to analyze it (let's say arrays).

1. 我听说audiolab"是一个合适的工具(它将 numpy 数组转换为 wav，反之亦然).
2. 我已经安装了audiolab"，但是我的 numpy 版本有问题(我无法从 numpy.testing 导入测试器").我有 1.1.1.numpy 的版本.

3. 我在 numpy (1.4.0) 上安装了更新版本.但后来我得到了一组新的错误:

1. I heard that "audiolab" is a suitable tool for that (it transforms numpy arrays into wav and vica versa).
2. I have installed the "audiolab" but I had a problem with the version of numpy (I could not "from numpy.testing import Tester"). I had 1.1.1. version of numpy.

3. I have installed a newer version on numpy (1.4.0). But then I got a new set of errors:

回溯(最近一次调用最后一次):文件test.py"，第 7 行，在导入 scikits.audiolab文件/usr/lib/python2.5/site-packages/scikits/audiolab/init.py"，第 25 行，在从 pysndfile 导入格式信息，sndfile文件/usr/lib/python2.5/site-packages/scikits/audiolab/pysndfile/init.py"，第 1 行，在从 _sndfile 导入 Sndfile，格式，available_file_formats，available_encodings文件numpy.pxd"，第 30 行，在 scikits.audiolab.pysndfile._sndfile (scikits/audiolab/pysndfile/_sndfile.c:9632)ValueError: numpy.dtype 似乎不是正确的类型对象

Traceback (most recent call last): File "test.py", line 7, in import scikits.audiolab File "/usr/lib/python2.5/site-packages/scikits/audiolab/init.py", line 25, in from pysndfile import formatinfo, sndfile File "/usr/lib/python2.5/site-packages/scikits/audiolab/pysndfile/init.py", line 1, in from _sndfile import Sndfile, Format, available_file_formats, available_encodings File "numpy.pxd", line 30, in scikits.audiolab.pysndfile._sndfile (scikits/audiolab/pysndfile/_sndfile.c:9632)ValueError: numpy.dtype does not appear to be the correct type object

我放弃了使用 audiolab 并认为我可以使用wave"包来读取 wav 文件.我问了一个问题，但人们建议改用 scipy.好的，我决定专注于 scipy(我有 0.6.0. 版本).

I gave up to use audiolab and thought that I can use "wave" package to read in a wav-file. I asked a question about that but people recommended to use scipy instead. OK, I decided to focus on scipy (I have 0.6.0. version).

但是当我尝试执行以下操作时:

But when I tried to do the following:

从 scipy.io 导入 wavfile
x = wavfile.read('/usr/share/sounds/purple/receive.wav')

from scipy.io import wavfile
x = wavfile.read('/usr/share/sounds/purple/receive.wav')

我得到以下信息:

Traceback (most recent call last):
  File "test3.py", line 4, in <module>
    from scipy.io import wavfile
  File "/usr/lib/python2.5/site-packages/scipy/io/__init__.py", line 23, in <module>
    from numpy.testing import NumpyTest
ImportError: cannot import name NumpyTest

1. 所以，我放弃了使用 scipy.我可以只使用wave包吗?我不需要太多.我只需要以人类可读的格式获取 wav 文件的内容，然后我会弄清楚如何处理它.

推荐答案

你试过 wave 模块了吗?它有更少的依赖:

Have you tried the wave module? It has fewer dependencies:

http://docs.python.org/library/wave.html

def everyOther (v, offset=0):
   return [v[i] for i in range(offset, len(v), 2)]

def wavLoad (fname):
   wav = wave.open (fname, "r")
   (nchannels, sampwidth, framerate, nframes, comptype, compname) = wav.getparams ()
   frames = wav.readframes (nframes * nchannels)
   out = struct.unpack_from ("%dh" % nframes * nchannels, frames)

   # Convert 2 channles to numpy arrays
   if nchannels == 2:
       left = array (list (everyOther (out, 0)))
       right = array (list  (everyOther (out, 1)))
   else:
       left = array (out)
       right = left

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