Sound output across the network possibility

[Stewart Williams <lists@xxxxxxxxxxxxxxxx>]

Sorry if this has been asked before, but I thought someone may know the 
exact answer quickly.

Computer A = Fedora 8
Computer B = Fedora 8

On Computer A I have headphones connected to my speaker jack and is 
where I listen to my music. However, I store also music on Computer B 
and have no speakers connected to the soundcard.

What I want to know is, is it possible to say double click on an mp3 
file on Computer B and have it output the sound through my network to 
the headphones connected on Computer A's soundcard?

And also (not essential) is this also possible if Computer A is running 
Windows?

Thanks in advance.