How do I utilize multiprocessing module in Python?

Question

I'm trying to add an alarm sound to my timer program, however whenever the function for the sound gets called, the program times out, and you have to wait until the sound file finishes. I've tried using asyncio and right now I'm trying to use multiprocessing modules to resolve this issue, however I've kept on hitting my head against a brick wall.

Here is my code right now for the program

import PySimpleGUI as sg
import time
from pydub import AudioSegment
from pydub.playback import play
import multiprocessing


duration = 500  # milliseconds
freq = 440  # Hz
sg.theme('DarkBrown4')
song = AudioSegment.from_mp3("alarm.mp3")
quiet_song = song - 40

def sound():
    play(quiet_song)



def main():
    centered_column = [[sg.T(('Set Time to Study'), font=('Consolas', 20))],
                       [sg.T((''), font=('Consolas', 20), key='countdown')],
                       [sg.B('Exit'),
                        sg.B('Start/Stop')],  # Buttons For Timer
                       [sg.B('Pomodoro'),
                        sg.B('Short Break'),
                        sg.B('Long Break')
                        ]]

    layout = [[sg.Text(key='-EXPAND-', font='ANY 1', pad=(0, 0))],  # the thing that expands from top
              [sg.Text('', pad=(0, 0), key='-EXPAND2-'),  # the thing that expands from left
               sg.Column(centered_column, vertical_alignment='center', justification='center', k='-C-')]]

    window = sg.Window('StudyWare Timer', layout, size=(400, 200), grab_anywhere=True, resizable=True, finalize=True)
    window['-C-'].expand(True, True, True)
    window['-EXPAND-'].expand(True, True, True)
    window['-EXPAND2-'].expand(True, False, True)

    active = False
    value = 0


    while True:
        event, values = window.Read(timeout=1000)
        # print(event, values)

        if event == sg.WIN_CLOSED or event == 'Exit':
            break

        m, s = divmod(value, 60)
        timerx = "%02d:%02d" % (m, s)


        if event == 'Pomodoro':
            # active = not active
            value = 1
            window.Element('countdown').Update(value=timerx)

        if event == 'Short Break':
            # active = not active
            value = 300
            window.Element('countdown').Update(value=timerx)
        if event == 'Long Break':
            # active = not active
            value = 900
            window.Element('countdown').Update(value=timerx)
        if event == 'Start/Stop':
            active = not active

        if event == '__TIMEOUT__' and active:
            window.Element('countdown').Update(value=timerx)
            value -= 1
            if value == -1:
                active = not active

    window.refresh()



if __name__ == '__main__':
    p2 = multiprocessing.Process(target=main())
    p = multiprocessing.Process(target=sound())
    p2.start()
    p.start()
    p2.join()
    p.join()

Any suggestions would be greatly appreciated! )))