Python 3.x with beep

# coding: utf-8

import winsound
import sys
import time

notes = {'A' : 440, 'B': 494, 'C' : 262, 'D' : 294, 'E' : 330, 'F' : 370, 'G' : 392}

def imperial_march():
    """ TOCA MARCHA IMPERIAL DO STAR WARS """
    print("Tocando Imperial March")
    while 1:
        frequencias = [440, 440, 440, 349, 523, 440, 349, 523, 440, 659, 659, 659, 698, 523, 415, 349, 523, 440]
        duracoes = [500, 500, 500, 350, 150, 500, 350, 150, 1000, 500, 500, 500, 350, 150, 500, 350, 150, 1000]
        i = 0
        while i < len(frequencias):
            sys.stdout.write('-')
            sys.stdout.flush()
            winsound.Beep(frequencias[i], duracoes[i])
            i += 1

def happy_birthday():
    global notes
    """ TOCA FELIZ ANIVERSARIO """
    print("Tocando Happy Birthday")
    while 1:
        frequencias = [notes['D'], notes['D'], notes['E'], notes['D'], notes['G'], notes['F']\
                       ,notes['D'], notes['D'], notes['E'], notes['D'], notes['A'], notes['G']\
                       ,notes['G'], notes['D'], notes['D'], notes['D'], notes['B'], notes['G']\
                       ,notes['F'], notes['E'], notes['C'], notes['C'], notes['B'], notes['G']\
                       ,notes['A'], notes['G']]
        i = 0
        while i < len(frequencias):
            sys.stdout.write('-')
            sys.stdout.flush()
            winsound.Beep(frequencias[i], int(frequencias[i]//.32))
            i += 1

def alphabet():
    global notes
    print("Tocando Alphabet Song")
    while 1:
        frequencias = [notes['C'], notes['D'], notes['E'], notes['F'], notes['G']\
                        ,notes['A'], notes['B'], notes['C'], notes['D']\
                       ,notes['E'], notes['F'], notes['G'], notes['A'], notes['B']]
        i = 0
        while i < len(frequencias):
            sys.stdout.write('-')
            sys.stdout.flush()
            winsound.Beep(frequencias[i], int(frequencias[i]//.32))
            i += 1


def menu():
    choices = {'happy birthday' : happy_birthday, 'alphabet' : alphabet, 'imperial march' : imperial_march}
    choice = input('Type a name of song: ').lower()
    if choice in choices:
        choices[choice]()
    else:
        print("Doesn't have your choice")

if __name__ == '__main__':
    try:
        menu()
    except KeyboardInterrupt:
        print("Exiting", end='')
        for i in range(10):
            sys.stdout.write('.')
            sys.stdout.flush()
            time.sleep(0.020)
        else:
            print()
            sys.exit(9)