VLC’s sound is crackling
Under Ubuntu, when playing a movie with
VLC, I hear some crackling. The audio output is distorted. With
mplayer everything works fine.
I found the solution here. This problem is caused by pulseaudio. Start VLC, then go to Tools -> Preferences -> Audio, and change the Output module from the default to ALSA. The distortion went away.
Note that I have Ubuntu on several machines and I had this problem on one machine only.