Basic soundtrack

[Plymouth]

I'm trying to learn the basics of scripting in Vizard/Python and I'm having some confusion. The code below is intended to just start, stop, or change the background music, but it's getting errors that I suppose must stem from me not understanding variable declarations. If someone could give me a push in the right direction I'd really appreciate it.


music = viz.add('song1.mp3')
music.loop(viz.ON)

def ChangeToFirst():
music.rewind()
music = viz.add('song1.mp3')
music.play()

def ChangeToSecond():
music.rewind()
music = viz.add('song2.mp3')
music.play()

def StopTheMusic():
music.rewind()

def mykey(key):
if key == '1':
ChangeToFirst()
elif key == '2':
ChangeToSecond()
elif key == ' ':
StopTheMusic()