Public bug reported:

totem plays certain ALAC files (.m4a containing Apple Lossless encoding) with 
horrible buzzing noises.
The exact same ALAC files decoded by 'alac-decoder' produce clearn .wav files 
which play flawlessly.

The problem does not occur with most ALAC files.   The one I found was a
mono file, so that might be a clue.

I used ffmpeg version SVN-r0.5.1-4:0.5.1-1ubuntu1 to encode the ALAC file, 
alac-decoder 0.1.3-0ubuntu3,
and totem 2.30.2-0ubuntu1

Here is the flow:

$ ffmpeg -i orig.wav -acodec alac alac.m4a  # encode as alac
$ totem alac.m4a  # horrible buzzing sounds
$ alac-decoder alac.m4a > decoded.wav
$ totem decoded.wav # plays cleanly

I'll attach an archive of the above files.  Fortunately they are short.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: libgstreamer0.10-0 0.10.28-1
ProcVersionSignature: Ubuntu 2.6.32-24.39-generic 2.6.32.15+drm33.5
Uname: Linux 2.6.32-24-generic x86_64
Architecture: amd64
Date: Sat Aug  7 22:58:54 2010
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: gstreamer0.10

** Affects: gstreamer0.10 (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug lucid

-- 
horrible distortion playing certain ALAC files (regression?)
https://bugs.launchpad.net/bugs/614919
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