Patch for https://bugzilla.redhat.com/show_bug.cgi?id=602903
(see also http://old.nabble.com/FIxed-alsa-tools'-envy24control-missing-peak-level-meters-and-"Reset-Peaks"-ts29144830.html )

(1) http://nielsmayer.com/npm/Screenshot-Efficient-Meters-Envy24Control.png
 * To see what the new meters look like.
(2) http://nielsmayer.com/npm/Efficient-Meters-Envy24Control.tgz
 * Contains levelmeters.c and x86_64 binary 'envy24control' that should at
   least work on Fedora 12 and OpenSuse and other 2.6.32-based distros.
(3) http://nielsmayer.com/npm/Efficient-Meters-Envy24Control.patch
 * To apply the patch, grab the most recent stable release (
   ftp://ftp.alsa-project.org/pub/tools/alsa-tools-1.0.23.tar.bz2 ) or
   git pull from trunk of the "alsa-tools" project.
 * After unpacking and assuming you've got the patch in
   ~/Efficient-Meters-Envy24Control.patch.patch do:
   >> cd alsa-tools-1.0.23
   >> cat ~/Efficient-Meters-Envy24Control.patch | patch -p1
  * It should give message "patching file envy24control/levelmeters.c"
  * Follow the directions to compile alsa-tools.