When I playback .wav files in pd, the sound is muffled and crackly. After exiting pd, the problem occurs in some other applications like Windows Media Player, and some websites like Hulu.

I'm running Windows 7, and this is the end part of the patch I'm using:

open $1.wav(
|
[readsf~]
|\
[dac~]

Any ideas about what's happening?