在 p5.js 中，我尝试运行两个音乐曲目，其中一个音乐曲目在执行 .play() 命令时不断创建未定义的错误

Question

这是我为科学课编写的简单宇宙飞船冒险游戏的一小段。目标是在不播放背景音乐时播放配乐菜单音乐。不起作用的代码是

menuMusic.play();

一旦我删除此行，一切都会运行 完美。

我尝试用有效的

menuMusic.play();

替换

backgroundMusic.play();

，但它仍然给出未定义的错误，所以这不是需要替换的音乐的问题。我也尝试过分离代码的两个部分，但这没有任何帮助。

//Variables
var menu = 0; // 0 = main menu, 1 = level select, 2 = gameplay, 3 = you died, 4 = level complete, 5 = credits
var playedMenuMusic = false; //false has not played, true has played
var playedBackgroundMusic = false; //false has not played, true has played


function setup() {
  menuMusic = loadSound("centaur-forest-60695.mp3");
  backgroundMusic = loadSound("8bit-music-for-game-68698.mp3");
}

function draw() {
  if (
    (menu == 2 || menu == 5) &&
    backgroundMusic.isPlaying() == false &&
    playedBackgroundMusic == false
  ) {
    //Background Music
    backgroundMusic.play();
    playedBackgroundMusic = true;
    //Menu Music
    menuMusic.stop();
    playedMenuMusic = false;
  }
  if (
    (menu == 0 || menu == 1 || menu == 3 || menu == 4) &&
    menuMusic.isPlaying() == false &&
    playedMenuMusic == false
  ) {
    //Menu Music
    menuMusic.play();
    playedMenuMusic = true;
    //Background Music
    backgroundMusic.stop();
    playedBackgroundMusic = false;
  }
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/1.9.0/p5.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/1.6.0/addons/p5.sound.min.js"></script>

Answer 1

好吧我修好了，问题是 menuMusic = loadSound("centaur-forest-60695.mp3");和 backgroundMusic = loadSound("8bit-music-for-game-68698.mp3"); 正在设置而不是预加载