how to play wav file in python?

问题:

I tried pygame for playing wav file like this:

import pygame
pygame.init()

pygame.mixer.music.load("mysound.wav")
pygame.mixer.music.play()
pygame.event.wait()

but It change the voice and I don't know why! I read this link solutions and can't solve my problem with playing wave file!

for this solution I dont know what should I import?

s = Sound() 
s.read('sound.wav') 
s.play()

and for this solution /dev/dsp dosen't exist in new version of linux :

from wave import open as waveOpen
from ossaudiodev import open as ossOpen
s = waveOpen('tada.wav','rb')
(nc,sw,fr,nf,comptype, compname) = s.getparams( )
dsp = ossOpen('/dev/dsp','w')
try:
  from ossaudiodev import AFMT_S16_NE
except ImportError:
  if byteorder == "little":
    AFMT_S16_NE = ossaudiodev.AFMT_S16_LE
  else:
    AFMT_S16_NE = ossaudiodev.AFMT_S16_BE
dsp.setparameters(AFMT_S16_NE, nc, fr)
data = s.readframes(nf)
s.close()
dsp.write(data)
dsp.close()

and when I tried pyglet It give me this error:

import pyglet

music = pyglet.resource.media('mysound.wav')
music.play()

pyglet.app.run()
--------------------------

nima@ca005 Desktop]$ python play.py
Traceback (most recent call last):
  File "play.py", line 4, in <module>
    music = pyglet.resource.media('mysound.wav')
  File "/usr/lib/python2.7/site-packages/pyglet/resource.py", line 587, in media
    return media.load(path, streaming=streaming)
  File "/usr/lib/python2.7/site-packages/pyglet/media/__init__.py", line 1386, in load
    source = _source_class(filename, file)
  File "/usr/lib/python2.7/site-packages/pyglet/media/riff.py", line 194, in __init__
    format = wave_form.get_format_chunk()
  File "/usr/lib/python2.7/site-packages/pyglet/media/riff.py", line 174, in get_format_chunk
    for chunk in self.get_chunks():
  File "/usr/lib/python2.7/site-packages/pyglet/media/riff.py", line 110, in get_chunks
    chunk = cls(self.file, name, length, offset)
  File "/usr/lib/python2.7/site-packages/pyglet/media/riff.py", line 155, in __init__
    raise RIFFFormatException('Size of format chunk is incorrect.')
pyglet.media.riff.RIFFFormatException: Size of format chunk is incorrect.
AL lib: ReleaseALC: 1 device not closed

回答1:

You can use PyAudio. An example here on my Linux it works:

#!usr/bin/env python  
#coding=utf-8  

import pyaudio  
import wave  

#define stream chunk   
chunk = 1024  

#open a wav format music  
f = wave.open(r"/usr/share/sounds/alsa/Rear_Center.wav","rb")  
#instantiate PyAudio  
p = pyaudio.PyAudio()  
#open stream  
stream = p.open(format = p.get_format_from_width(f.getsampwidth()),  
                channels = f.getnchannels(),  
                rate = f.getframerate(),  
                output = True)  
#read data  
data = f.readframes(chunk)  

#play stream  
while data:  
    stream.write(data)  
    data = f.readframes(chunk)  

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

#close PyAudio  
p.terminate()  

回答2:

The reason pygame changes your audio is mixer defaults to a 22k sample rate:

initialize the mixer module
pygame.mixer.init(frequency=22050, size=-16, channels=2, buffer=4096): return None

Your wav is probably 8k. So when pygame plays it, it plays roughly twice as fast. So specify your wav frequency in the init.

Pyglet has some problems correctly reading RIFF headers. If you have a very basic wav file (with exactly a 16 byte fmt block) with no other information in the fmt chunk (like 'fact' data), it works. But it makes no provision for additional data in the chunks, so it's really not adhering to the RIFF interface specification.