KMix is KDE's soundcard mixer program. Though small, it is full-featured. The program should give controls for each of your soundcards.
KMix supports several platforms and sound drivers. Version 1.9 works with:
All Open Sound System platforms. Explicitly tested are Linux, FreeBSD, NetBSD and BSDI.
Solaris based machines.
IRIX based machines.
The ALSA soundcard driver.
HP-UX based machines.