VOLControl plugins help

Param Examples:

   master volume control(default):
    m 60%:        // master volume set to 60%.
    m +5%:        // master volume up 5%.
    m -5%:        // master volume down 5%.
    100%          // default master volume set to 100%.
    +2%           // default master volume up 2%
    -2%           // default master volume down 2%.
    m             // auto switch master volume mute on/off

   wave volume control:
    w 50%:        // wave volume set to 50%.
    w +1%:        // wave volume up 1%.
    w -1%:        // wave volume down 1%.
    w             // auto switch wave volume mute on/off
