yes, do it on an exitframe. 

on exitFrame me
  if sound(whichChannel).volume > 50 then
    sound(whichChannel).volume = sound(whichChannel).volume - 1
    updateStage
  end if
end

is one simple way. it can be expanded into a frame script that can have
a property for the current volume, so you don't have to check it every
time, and a property for the lower limit, so that can be varied (if
that's useful), and even a property boolean flag for when to start the fade...

--bh

repeat with vol = 150 down to 50
sound(whichChannel).volume = vol
updateStage
end repeat

Kamil Dabkowski wrote:
> 
> Hi,
> 
> I'd like to slowly fade sound down from volume = 150 to volume = 50, not
> to volume = 0.
> How can I do that? Some kind of a loop?
> 
> Thanks
> 
> Kamil
> 
> --
> Kamil Dabkowski
> Geometrek
> http://stop.at/kamil
> 
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