ummm? Beep beep beep. Wouldnt it be more prudent to send this data to your computer via the network to some program that visualises the progress?
Most dispatchers can do this you know.
Anyway it depends on you rsystem on windows you can simply echo ^G in a sytem command unfortunately i didnt get any way to copypaste a real control g character into mayas sytem command even after huge effort so i suggest you use this as a post render script.
system "start sndrec32 /play /close C:WINDOWSMediaNotify.wav";
or injecting it directly via mel
setAttr -type "string" defaultRenderGlobals.postRenderMel "system "start sndrec32 /play /close C:WINDOWSMediaNotify.wav";";
Note the wav can be anything you choose giving each machine a different tone would give you a nice harmonic! o r ebvene stepping trough a tune You can meke it so the window does not appear with vbscripting. But why go fishing further at the sea?
or you can make a bat file called beep.bat wich contains echo ^G
Note dont type ^ and G but rether press controll and g. And you cant do this in notepad, making this a bit hard. you must copy the character form http://www.efn.org/~gjb/asciidec.htmlhttp://www.efn.org/~gjb/asciidec.html here its the 007 one.
PS. if loosing focus or window is annoyin use
system "shell "start /min sndrec32 /play /close C:WINDOWSMediaNotify.wav"";