如何在 Pygame 中初始化混音器 [重复]

Question

我正在尝试使用 pygame 制作一个飞扬的小鸟游戏。 当我尝试运行我的代码时，它在编译时一直给我一个错误。与本网站上发布的其他问题不同，这是关于修复错误而不是声音本身。 这是与我遇到的问题相关的代码：

if __name__ == "__main__":
    pygame.init()
    fps_clock = pygame.time.Clock()
    pygame.display.set_caption('Flappy Bird')

    #adding images into dictionary
    game_images['numbers'] = (
        pygame.image.load('gallery/images/0.png').convert_alpha(),
        pygame.image.load('gallery/images/1.png').convert_alpha(),
        pygame.image.load('gallery/images/2.png').convert_alpha(),
        pygame.image.load('gallery/images/3.png').convert_alpha(),
        pygame.image.load('gallery/images/4.png').convert_alpha(),
        pygame.image.load('gallery/images/5.png').convert_alpha(),
        pygame.image.load('gallery/images/6.png').convert_alpha(),
        pygame.image.load('gallery/images/7.png').convert_alpha(),
        pygame.image.load('gallery/images/8.png').convert_alpha(),
        pygame.image.load('gallery/images/9.png').convert_alpha()
        )
    game_images['message'] = pygame.image.load('gallery/images/message.png').convert_alpha()
    game_images['base'] = pygame.image.load('gallery/images/base.png').convert_alpha()
    game_images['pipe'] = (
        pygame.transform.rotate(pygame.image.load(pipe).convert_alpha(), 180),
        pygame.image.load(pipe).convert_alpha()
        )
    game_images['background'] = pygame.image.load(background).convert_alpha()
    game_images['player'] = pygame.image.load(player).convert_alpha()
    game_images['title'] = pygame.image.load(title).convert_alpha()

    #adding sounds into dictionary
    game_sounds['die'] = pygame.mixer.Sound('gallery/audio/die.wav')
    game_sounds['hit'] = pygame.mixer.Sound('gallery/audio/hit.wav')
    game_sounds['point'] = pygame.mixer.Sound('gallery/audio/point.wav')
    game_sounds['swoosh'] = pygame.mixer.Sound('gallery/audio/swoosh.wav')
    game_sounds['wing'] = pygame.mixer.Sound('gallery/audio/wing.wav')

    while True:
        welcomeScreen()
        mainGame()

每当我尝试运行时，它都会给我这个错误：

我已经初始化了pygame.init()，所以不知道是什么问题。 我目前在 Mac 上使用 VScode 代码空间。