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graphical interface elements

track = mixer.Sound(sound_file)
track_playing = IntVar()
track_button = Checkbutton(app, variable = track_playing,
command = track_toggle,

text = sound_file)
track_button.pack(side = LEFT)

Add the code
that implements
the volume
control here.

def shutdown():
track.stop()
app.destroy()

app.protocol("WM_DELETE_WINDOW", shutdown)

app.mainloop()

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