Bug#588901: High-level noise and sound deformation with libao4 on debian-ppc

[Jad Zoghaïb]

Package: libao4
Version: 1.0.0-4
Severity: important

Hello,

After upgrading mpg321 from version 0.2.10.6 which uses libao2 to version 0.2.12-1 which uses libao4, I started having the following problems when playing a mp3 file:
- high-level noise in the background
- sound deformation especially on voices.
I first filled a bug report for mpg321 (bug number 588531) where I have attached a mp3 file which corresponds to the output sound of my system (having mpg321 write a wav file then I converted it to mp3)
(http://bugs.debian.org/cgi-bin/bugreport.cgi?msg=5;filename=Sample_output_mpg321.mp3;att=1;bug=588531)
If you listen to the mp3 file, you will be able to hear the problems.
However, after a discussion with the mpg321 maintainer and a few tests (he sent me a short code using libao to play a wav file), we identified that the problem came from libao4.
Wav files play just fine when the code is compiled against libao2 but the problems I have described appear when it is compiled against libao4.

This problem only occurs on the debian-ppc version (it works fine on my amd64 debian desktop).
If that seems relevant, could you merge the previously filled bug report for mpg321 (588531) with this new one?

Please tell me if you would need more information.
Best regards.

Jad

-- System Information:
Debian Release: squeeze/sid
  APT prefers testing
  APT policy: (900, 'testing'), (600, 'stable'), (500, 'unstable')
Architecture: powerpc (ppc)

Kernel: Linux 2.6.32-5-powerpc
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages libao4 depends on:
ii  libao-common                  1.0.0-4    Cross Platform Audio Output Librar
ii  libc6                         2.11.2-2   Embedded GNU C Library: Shared lib

libao4 recommends no packages.

Versions of packages libao4 suggests:
ii  libasound2                    1.0.23-1   shared library for ALSA applicatio
ii  libaudio2                     1.9.2-3    Network Audio System - shared libr
ii  libesd0                       0.2.41-7   Enlightened Sound Daemon - Shared 
ii  libpulse0                     0.9.21-1   PulseAudio client libraries

-- no debconf information