Why can there be a problem when playing audio files through pyglet?

Question

Python

Good afternoon.
I'm trying to write a script that plays audio files. Googled this code:
import pyglet
song = pyglet.media.load(filename)
song.play()
pyglet.app.run()
Installed pyglet and avbin. But the sound is played incorrectly - instead of the contents of the file, there is some kind of humming and rattling noise.
Tried on mp3 and wav - the problem exists in both cases.
Moreover, on some files, the duration of the noise is approximately equal to the duration of the file, and on some - 10 times less.
Python 3.5 on Win7x64
UPD: Now I tried it with pygame - same problem. But if the files are run manually, they play normally.