Bug#547639: audacity: would be nice to see better curve-fitting at extreme zooms

[Jasen Betts]

Package: audacity
Version: 1.3.5-2+lenny1
Severity: wishlist


It would be nice to see better curve-fitting at extreme zooms
eg create a 19Khz tone in a 44.1Khz sampled track 
and zoom in so 3ms fills the screen
 
It would be nice to see something resembling a textbook sine wave

Perhaps this can be approximated using 
http://en.wikipedia.org/wiki/Whittaker–Shannon_interpolation_formula

It feels like it'd be compute-heavy (even with a purpose generated
table-based sinc function and integer arithmetic) so possibly should be 
an option (Sigma 0 to infinity looks problematic too)

The change-speed effect seems to contain the neccessary functionality
if I slow the track by 90% I now see something resembling the textbook sine 

-- System Information:
Debian Release: squeeze/sid
  APT prefers stable
  APT policy: (700, 'stable')
Architecture: i386 (i686)

Kernel: Linux 2.6.26-2-686 (SMP w/2 CPU cores)
Locale: LANG=en_NZ.UTF-8, LC_CTYPE=en_NZ.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages audacity depends on:
ii  libasound2              1.0.19-1         shared library for ALSA applicatio
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            2.16.6-2         The GLib library of C routines
ii  libgtk2.0-0             2.12.12-1~lenny1 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                 1.1.3-5          Ogg Bitstream Library
ii  libsndfile1             1.0.18-2         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-4     The Vorbis General Audio Compressi
ii  libvorbisenc2           1.2.0.dfsg-4     The Vorbis General Audio Compressi
ii  libvorbisfile3          1.2.0.dfsg-4     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