<audio loop src="/photo/aa.mp3" id="audio" autoplay preload="auto">

//--创建页面监听，等待微信端页面加载完毕 触发音频播放
document.addEventListener('DOMContentLoaded', function () {
    function audioAutoPlay() {
        var audio = document.getElementById('audio');
            audio.play();
        document.addEventListener("WeixinJSBridgeReady", function () {
            audio.play();
        }, false);
    }
    audioAutoPlay();
});
//--创建触摸监听，当浏览器打开页面时，触摸屏幕触发事件，进行音频播放
document.addEventListener('touchstart', function () {
    function audioAutoPlay() {
        var audio = document.getElementById('audio');
            audio.play();
    }
    audioAutoPlay();
});

<script src="http://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>

<script>
        function autoPlayVideo(){
            wx.config({
                debug:false,
                appId:"",
                timestamp:1,
                nonceStr:"",
                signature:"",
                jsApiList:[]
            });
            wx.ready(function(){
                var autoplayVideo=document.getElementById("audio");
                autoplayVideo.play()
            })
        };
        autoPlayVideo();
</script>