Song title name scroll in windows media player task bar
Have the song playing in windows media player show it's name within the minimized bar on the task bar. Have it scrolled so you can read it.
It has nothing to do with the taskbar.
It has to be implemented in WMP.
BTW, WMP is not the optimal player for music. There are many great players out there (e.g. AIMP2, which I use).