[Pkg-mpd-maintainers] Bug#680328: mpd: using software mixer produces sound distortion

[David Dušanić]

Package: mpd
Version: 0.17-1
Severity: normal
Tags: upstream

Dear Maintainer,
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I use MPD with ncmpcpp. On the newest version 0.17-1 under Debian Sid whenever
I use the software mixer to control the volume it produces a heavy acoustic
noise. In my mpd.conf I applied to use the software mixer not the hardware
mixer.
The strange thing is, most of the time the volume is set to 100% and it works
just fine but when I lower the volume it will produce the noise I speak of. The
distortion stops when I set the volume back to 100%.

I use Alsa as sound output and alsaequal provided by the package libasound2
-plugin-equal if that matters.
Controlling the volume via alsamixer works as expected. Maybe it is on my side,
I am not sure. Version 0.16.7-2 worked without a problem.



-- System Information:
Debian Release: wheezy/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: i386 (i686)

Kernel: Linux 3.2.0-3-686-pae (SMP w/2 CPU cores)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages mpd depends on:
ii  adduser                           3.113+nmu3
ii  libao4                            1.1.0-2
ii  libasound2                        1.0.25-3
ii  libaudiofile1                     0.3.4-1
ii  libavahi-client3                  0.6.31-1
ii  libavahi-common3                  0.6.31-1
ii  libavahi-glib1                    0.6.31-1
ii  libavcodec53                      7:0.10.3-dmo1
ii  libavformat53                     7:0.10.3-dmo1
ii  libavutil51                       7:0.11.1-dmo2
ii  libc6                             2.13-34
ii  libcdio-cdda1                     0.83-4
ii  libcdio-paranoia1                 0.83-4
ii  libcdio13                         0.83-4
ii  libcurl3-gnutls                   7.26.0-1
ii  libfaad2                          2.7-8
ii  libflac8                          1.2.1-6
ii  libgcc1                           1:4.7.1-2
ii  libglib2.0-0                      2.32.3-1
ii  libid3tag0                        0.15.1b-10
ii  libiso9660-8                      0.83-4
ii  libjack-jackd2-0 [libjack-0.116]  1.9.8~dfsg.4+20120529git007cdc37-1
ii  libmad0                           0.15.1b-7
ii  libmikmod2                        3.1.12-4
ii  libmms0                           0.6.2-3
ii  libmodplug1                       1:0.8.8.4-3
ii  libmp3lame0                       1:3.99.5-dmo1
ii  libmpcdec6                        2:0.1~r459-4
ii  libmpg123-0                       1.14.2+svn20120622-1
ii  libogg0                           1.3.0-4
ii  libpulse0                         2.0-3
ii  libresid-builder0c2a              2.1.1-13
ii  libsamplerate0                    0.1.8-5
ii  libshout3                         2.2.2-8
ii  libsidplay2                       2.1.1-13
ii  libsidutils0                      2.1.1-13
ii  libsndfile1                       1.0.25-5
ii  libsqlite3-0                      3.7.13-1
ii  libstdc++6                        4.7.1-2
ii  libsystemd-daemon0                44-3
ii  libvorbis0a                       1.3.2-1.3
ii  libvorbisenc2                     1.3.2-1.3
ii  libvorbisfile3                    1.3.2-1.3
ii  libwavpack1                       4.60.1-3
ii  libyajl2                          2.0.4-2
ii  lsb-base                          4.1+Debian7

mpd recommends no packages.

Versions of packages mpd suggests:
ii  avahi-daemon              0.6.31-1
pn  icecast2                  <none>
ii  mpc [mpd-client]          0.22-1
ii  mpdscribble [mpd-client]  0.22-3
ii  ncmpcpp [mpd-client]      0.5.10-1
pn  pulseaudio                <none>

-- no debconf information