Usage:

   dm [OPTIONS...]

   options:
      * inputs: 
      	   dsp (fx0, in0)
	   dsp1 (fx1, in1)
	   analog (ac97rec, in2)
	   spdif (cd, in3)
	   in4
	   in5
	   in6 (mic, linein)
	   in7
	   in8
      * outputs:
           front (ac97, out0)
	   out1
	   out2
	   out3 (headphones)
	   rear (out4)
	   record (out5)
      * commands:
           mute
	   unmute
           [+|-]n (0 <= n <= 100)

   more inputs/outputs can be specified
   when no input and/or output is specified, all are used
   negation (~) can be used with inputs and outputs
   when no command is used status of specified channels is printed
   [+|-]n command can be used twice -- for left and right channel

Examples:

   dm unmute dsp front
   dm dsp front 100
   dm front 60 70
   dm -20 -30
   dm front
   dm mute ~front
