controlling volume from command line

[D. R. Evans]

For years I have used the command:
  dcop kmix Mixer0 setVolume 0 0
to set volume to zero.

How do I do this in KDE4 (specifically, Kubuntu 8.10)?

Out-of-the-box, I receive the following error:

----

[HN:~] dcop kmix Mixer0 setVolume 0 0
object not accessible
[HN:~]

----

Presumably this has changed because now dbus is used for communication
instead of dcop (at least, to the extent that I understand any of this,
that's what I understand). So I imagine that there's some sort of dbus-send
command that's the equivalent. But it's not obvious how to discover the
correct command (other than chickening out and asking here :-) )

  Doc
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