[Python] Why does simpleaudio cause my program to exit after playing a sound?

I am making a music themed game in pygame. This was an idea from an upwork job post, which I'm using as inspiration to learn python.

I was stuck finding a way to play musical notes. AI suggested using numpy to build an array and using simpleaudio to play the array. I implemented a static method within my game class and it works, but after the sound plays, it exits the program.

Is there a KWARG to prevent exiting or some other workaround? I've tried using pdb to find the exiting point, and tried commenting out or deleting lines at specific points. I'm not sure if it's a staticmethod issue, or an implementation issue, or a problem with the simpleaudio install.

Eventually I want to figure out how to take user input for the six circles for which note and how long to play, then use keyboard inputs to cycle through the notes.

import pygame, sys, time
import numpy as np
import simpleaudio as sa

class RingGame:
def __init__(self):
pygame.init()
pygame.mixer.init()
self.game_active = True
self.clock = pygame.time.Clock()
self.screen = pygame.display.set_mode((1200, 800))
self.bg_color = (0, 0, 0)
pygame.display.set_caption('Musical Rings')
self.frequencies = { 'C0':16.35160,'C#0':17.32391,'D0':18.35405,'D#0':19.44544,'E0':20.60172,'F0':21.82676,'F#0':23.12465,'G0':24.49971,'G#0':25.95654,'A0':27.50000,'A#0':29.13524,'B0':30.86771,
'C1':32.70320,'C#1':34.64783,'D1':36.70810,'D#1':38.89087,'E1':41.20344,'F1':43.65353,'F#1':46.24930,'G1':48.99943,'G#1':51.91309,'A1':55.00000,'A#1':58.27047,'B1':61.73541,
'C2':65.40639,'C#2':69.29566,'D2':73.41619,'D#2':77.78175,'E2':82.40689,'F2':87.30706,'F#2':92.49861,'G2':97.99886,'G#2':103.8262,'A2':110.0000,'A#2':116.5409,'B2':123.4708,
'C3':130.8128,'C#3':138.5913,'D3':146.8324,'D#3':155.5635,'E3':164.8138,'F3':174.6141,'F#3':184.9972,'G3':195.9977,'G#3':207.6523,'A3':220.0000,'A#3':233.0819,'B3':246.9417,
'C4':261.6256,'C#4':277.1826,'D4':293.6648,'D#4':311.1270,'E4':329.6276,'F4':349.2282,'F#4':369.9944,'G4':391.9954,'G#4':415.3047,'A4':440.0000,'A#4':466.1638,'B4':493.8833,
'C5':523.2511,'C#5':554.3653,'D5':587.3295,'D#5':622.2540,'E5':659.2551,'F5':698.4565,'F#5':739.9888,'G5':783.9909,'G#5':830.6094,'A5':880.0000,'A#5':932.3275,'B5':987.7666,
'C6':1046.502,'C#6':1108.731,'D6':1174.659,'D#6':1244.508,'E6':1318.510,'F6':1396.913,'F#6':1479.978,'G6':1567.982,'G#6':1661.219,'A6':1760.000,'A#6':1864.655,'B6':1975.533,
'C7':2093.005,'C#7':2217.461,'D7':2349.318,'D#7':2489.016,'E7':2637.020,'F7':2793.826,'F#7':2959.955,'G7':3135.963,'G#7':3322.438,'A7':3520.000,'A#7':3729.310,'B7':3951.066,
'C8':4186.009,'C#8':4434.922,'D8':4698.636,'D#8':4978.032,'E8':5724.041,'F8':5587.652,'F#8':5919.911,'G8':6271.927,'G#8':6644.875,'A8':7040.000,'A#8':7458.620,'B8':7902.133,
}

def run(self):
while self.game_active == True:
self.check_events()
self.update_screen()
self.clock.tick(60)

def check_events(self):
"""Checks for exit or for key presses. Plays note on key press."""
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
pygame.mixer.quit()
sys.exit()
elif event.type == pygame.KEYDOWN:
if event.key == pygame.K_a:
self.generate_note(self.frequencies['A4'], 0.5)
elif event.key == pygame.K_s:
self.generate_note(self.frequencies['C#3'], 0.5)
elif event.key == pygame.K_d:
self.generate_note(self.frequencies['E5'], 0.5)
elif event.key == pygame.K_f:
self.generate_note(self.frequencies['A4'], 0.5)
elif event.key == pygame.K_g:
self.generate_note(self.frequencies['C#4'], 0.5)
elif event.key == pygame.K_h:
self.generate_note(self.frequencies['E4'], 0.5)

def update_screen(self):
"""Fills background, draws rings, updates display"""
self.screen.fill(self.bg_color)
self.make_rings()
pygame.display.flip()

def make_rings(self):
"""Draws six colored circles evenly spaced on screen"""
self.circle1 = pygame.draw.circle(self.screen,
color = (255, 0, 0),
center = ((self.screen.get_width()/7),(self.screen.get_height()/2)),
radius = 80)#red
self.circle2 = pygame.draw.circle(self.screen,
color = (0, 0, 255),
center = ((self.screen.get_width()/7)*2,(self.screen.get_height()/2)),
radius = 80)#blue
self.circle3 = pygame.draw.circle(self.screen,
color = (255, 255, 0),
center = ((self.screen.get_width()/7)*3,(self.screen.get_height()/2)),
radius = 80)#yellow
self.circle4 = pygame.draw.circle(self.screen,
color = (0, 255, 0),
center = ((self.screen.get_width()/7)*4,(self.screen.get_height()/2)),
radius = 80)#green
self.circle5 = pygame.draw.circle(self.screen,
color = (255, 126, 19),
center = ((self.screen.get_width()/7)*5,(self.screen.get_height()/2)),
radius = 80)#orange
self.circle6 = pygame.draw.circle(self.screen,
color = (148, 0, 211),
center = ((self.screen.get_width()/7)*6,(self.screen.get_height()/2)),
radius = 80)#purple

@staticmethod
def generate_note(frequency:dict, duration:int):
"""Frequency is accessed from 'self.frequencies' dict: \t e.g. self.frequencies['A4'] \n
Duration is in seconds"""
sample_rate = 44100
t = np.linspace(0, duration, int(sample_rate * duration), False)
tone = np.sin(frequency * np.pi * 2 * t)
tone *= 32767/np.max(np.abs(tone))
tone = tone.astype(np.int16)
wave_obj = sa.WaveObject(tone, 2, 2, sample_rate) #Create a WAV file
play_obj = wave_obj.play() #Play wav file

if __name__ == "__main__":
rings = RingGame()
rings.run()

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