Long time I have used this account. This problem happened in LinuxMint
Debian Edition - the core files are from debian. This is not Ubuntu
related, and upstream "trouble".

How I recieved this "crispy, fuzzy" sound:
- I have edited /etc/pulse/daemon.conf and increased fragment amount and msec. 
This should reduce delays in slower apps (wine).
- next, I killed pulse audio (ps aux|grep pulse; kill -15 xxx)

Immediate result is this crispy, fuzzy audio in VLC, but even in OpenArena 
0.8.8.
In VLC it disappears if I increase/decrease volume, but reappears if I restart 
VLC, change different media or navigate.
In Openarena it disappears after 10 seconds.

This looks like a problem with buffers to me.

The solution #21
"rm -r ~/.pulse"
solved the issue.

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to pulseaudio in Ubuntu.
https://bugs.launchpad.net/bugs/751265

Title:
  pulseaudio distorts VLC audio

Status in “pulseaudio” package in Ubuntu:
  Confirmed

Bug description:
  Binary package hint: pulseaudio

  Audio quality full of hiss (similar to what it might sound like if you pulled 
your headphone/speaker plug out halfway). The hiss distortion is constant and 
affects all VLC 1.1.8 audio. True for all audio sources: internet stream, mp3, 
cd, flv, etc.
  Problem occurred on a clean install of Ubuntu 11.04 beta (32-bit)  using only 
the included repositories, and updated as of today's date. Pulseaudio version: 
1:0.9.22+stable-queue-24-g67d18-0ubuntu2
  Disabling pulseaudio allows VLC to play cleanly. Have not observed audio 
distortion with other players using pulseaudio.
  Would like to see VLC operate properly with pulseaudio. I had no issues on 
same machine using Ubuntu 10.10 and VLC 1.1.4.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.04
  Package: pulseaudio 1:0.9.22+stable-queue-24-g67d18-0ubuntu2
  ProcVersionSignature: Ubuntu 2.6.38-7.39-generic 2.6.38
  Uname: Linux 2.6.38-7-generic i686
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/pcmC0D0p:   blaine     2039 F...m vlc
  Card0.Amixer.info:
   Card hw:0 'Audigy2'/'SB Audigy 2 [SB0350b] (rev.4, serial:0x20061102) at 
0xcc80, irq 19'
     Mixer name : 'SigmaTel STAC9750,51'
     Components : 'AC97a:83847650'
     Controls      : 211
     Simple ctrls  : 46
  Card1.Amixer.info:
   Card hw:1 'U0x46d0x8ca'/'USB Device 0x46d:0x8ca at usb-0000:00:1d.7-6, high 
speed'
     Mixer name : 'USB Mixer'
     Components : 'USB046d:08ca'
     Controls      : 2
     Simple ctrls  : 1
  Card1.Amixer.values:
   Simple mixer control 'Mic',0
     Capabilities: cvolume cvolume-joined cswitch cswitch-joined penum
     Capture channels: Mono
     Limits: Capture 0 - 3072
     Mono: Capture 0 [0%] [18.00dB] [off]
  Card2.Amixer.info:
   Card hw:2 'Generic'/'HD-Audio Generic at 0xefddc000 irq 43'
     Mixer name : 'ATI R6xx HDMI'
     Components : 'HDA:1002aa01,00aa0100,00100200'
     Controls      : 4
     Simple ctrls  : 1
  Card2.Amixer.values:
   Simple mixer control 'IEC958',0
     Capabilities: pswitch pswitch-joined penum
     Playback channels: Mono
     Mono: Playback [on]
  Date: Tue Apr  5 06:32:13 2011
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta i386 (20110330)
  ProcEnviron:
   LANGUAGE=en_US:en
   PATH=(custom, user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: pulseaudio
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/08/2007
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A07
  dmi.board.name: 0HJ054
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 6
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvrA07:bd01/08/2007:svnDellInc.:pnDellDM051:pvr:rvnDellInc.:rn0HJ054:rvr:cvnDellInc.:ct6:cvr:
  dmi.product.name: Dell DM051
  dmi.sys.vendor: Dell Inc.

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