asterisk users - Jun 2009 - optimising asterisk sounds for g722

Hi,

After upgrading to 1.6.x and "hdvoice" (g722) polycome phones I am
wondering how to optimize asterisk sounds and music on hold to take
advantage of that codec. I often listen to a special music extension on
my headset:

/usr/bin/wget -q -O - http://music.example.com | /usr/bin/madplay -Q -z -o raw:-
--mono -R 8000 -

I tried doubling the frequency to 16000 but this "slows down" the
music.
What should I do to get better music quality while retaining backwards
compatibility to g711?

Thanks,