Sound card change - how do I reconfigure?

[Neil Woolford]

I've just changed the soundcard on my PIII Ubuntu machine.

It was some kind of early two channel pci Soundblaster, now I've
fitted a Soundblaster Live 5.1 card, again pci.  Not the latest,
but drives a 5.1 speaker set...

Simply swapping the cards has given me a system that works, but I
don't think it is quite right yet.  The main problem is that when
I open the mixer from the Gnome Volume Control I get two mixer tabs,
one OSS and one ALSA.  The OSS mixer appears ok, but the ALSA one
contains many duplicated entries for controls.  This makes it
difficult and confusing to control the sound.

Is there a way in which I should be reconfiguring the sound system,
rather like the way I would use dpkg-reconfigure xfree86 (?) after
changing the display hardware?

Neil