tkSnack not playing sound

[Gammastre]

Hi,
I'm new to programming, and I'm trying to make a simple metronome program. I can't figure out why sound is not being played. The tk window does open, but otherwise, nothing else happens.

from Tkinter import *
import tkSnack

root = Tk()

tkSnack.initializeSnack(root)

testsound = tkSnack.Sound(load='/Users/nikitahaduong/Desktop/Python/metronomesound.mp3')
testsound.play()

root.mainloop()