Working with
usage is straightforward. Every mixer device that your soundcard provides is represented by a volume slider. Mono devices have a single slider, stereo devices can have either one or two sliders, depending on your choice. Additionaly there is a panning slider at the bottom of the window. If you have multiple soundcards, they will each have their own tab.

Volume sliders
The volume sliders have a context menu, accessible by right clicking on the slider or device icon (at the top). Three entries are possible, but only those applicable are shown.
Muted 	Mute or unmute the device
Split Channels 	Show either one or two sliders. This is only applicable to stereo devices. The right slider controls right side volume, and the left controls left side volume.
Set Record Source 	Set this device as record source. Only applicable to recordable devices. This can also be done by clicking the red button below the slider (if it is available).

Panning slider
With this slider you can control the volume distribution between left and right speaker. This slider is an overall regulator, which affects all stereo devices (Mono devices are ignored). The middle position is the default. Dragging the slider to the left lowers the volume of the right speaker, dragging it to the right vice versa. Of course, these might be swapped if your speakers aren't positioned correctly.

Configuration options
If the icon is docked into the system tray, you can right click it to choose preferences. These items are:
Dock into panel 	minimize to an icon in the system tray
Only hide window with close button - don't close KMix 	Just minimize when closing the window, don't close it.
Show tickmarks 	Show lines to mark positions on the sliders.
Show labels 	Display labels for each of the sound devices. Wether this item is checked or not, by holding the mouse over the icon for each device, you can see this information.