Sound But No Sound

["Thomas H. George" <lists@tomgeorge.info>]

Sound: alsaplayer plays cd's & totem plays videos.  alsamixer adjusts
volume.

No Sound: Audacity has no input control - input options are determined
by the sound card so presumably Audacity doesn't see the sound card.
Neither does alsactl.  alsactl names returns nothing and alsactl card0
says card0 is an unknown command.  less /proc/asound/card0/id returns
NVidia.

The system is Lenny and Audacity 1.3.5-beta was installed with apt-get.
Since this is a beta version perhaps the problem is an Audacity bug but,
if so, what is alsactl's problem.

Any suggestins?

Tom