Mixers provide a convenient means of controlling the volume and balance of the sound output and input of computers. For a description of the default KDE mixer applet, refer to Section 1.18, Controlling Sound with KMix.
The main difference between the various mixers is the outer appearance of the user interface. However, there are a number of mixers that are designed for specific hardware. From the mixers available, select the one that best suits your needs.
HINT: Starting the Mixer
Generally, it is advisable to open a mixer application before opening other sound applications. Use the mixer to test and adjust the control settings for the input and output of the sound card.