here is the applescript
open script editor and paste this in, save it as iTunesWake.scpt (compiled script)
Code:
tell application "Finder"
if processes contains {process "iTunes"} then
-- iTunes is running
tell application "iTunes"
set vol to sound volume as number
set sound volume to 0
back track
play
repeat with i from 1 to vol
set sound volume to i
set i to i + 1
delay 0.4
end repeat
end tell
end if
end tell