Bug#514558: audacity: incorrect decibel scale

john.lindgren at tds.net john.lindgren at tds.net
Sun Feb 8 21:54:51 UTC 2009


Package: audacity
Version: 1.3.5-2
Severity: normal


A tone generated at 10 percent of the PCM range should be shown as -10 decibels,
if my understanding is correct.  Audacity's "Waveform (dB)" view shows it as -20
instead.  The "Amplify" effect also suggests amplifying it 20 decibels to
maximize the volume.  Is this wrong, or am I missing something?


-- System Information:
Debian Release: 5.0
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: i386 (i686)

Kernel: Linux 2.6.26-1-686 (SMP w/1 CPU core)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages audacity depends on:
ii  libasound2                1.0.16-2       ALSA library
ii  libc6                     2.7-18         GNU C Library: Shared libraries
ii  libexpat1                 2.0.1-4        XML parsing C library - runtime li
ii  libflac++6                1.2.1-1.2      Free Lossless Audio Codec - C++ ru
ii  libflac8                  1.2.1-1.2      Free Lossless Audio Codec - runtim
ii  libgcc1                   1:4.3.2-1.1    GCC support library
ii  libglib2.0-0              2.18.3-1       The GLib library of C routines
ii  libgtk2.0-0               2.14.5-1       The GTK+ graphical user interface 
ii  libid3tag0                0.15.1b-10     ID3 tag reading library from the M
ii  libjack0                  0.109.2-5      JACK Audio Connection Kit (librari
ii  libmad0                   0.15.1b-4      MPEG audio decoder library
ii  libogg0                   1.1.3-4        Ogg Bitstream Library
ii  libsndfile1               1.0.17-4       Library for reading/writing audio 
ii  libsoundtouch1c2          1.3.1-2        sound stretching library
ii  libstdc++6                4.3.2-1.1      The GNU Standard C++ Library v3
ii  libvorbis0a               1.2.0.dfsg-3.1 The Vorbis General Audio Compressi
ii  libvorbisenc2             1.2.0.dfsg-3.1 The Vorbis General Audio Compressi
ii  libvorbisfile3            1.2.0.dfsg-3.1 The Vorbis General Audio Compressi
ii  libwxbase2.6-0            2.6.3.2.2-3    wxBase library (runtime) - non-GUI
ii  libwxgtk2.6-0             2.6.3.2.2-3    wxWidgets Cross-platform C++ GUI t

audacity recommends no packages.

Versions of packages audacity suggests:
pn  ladspa-plugin                 <none>     (no description available)

-- no debconf information





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