试试这个
var jweixin = require('jweixin-module');	//引入jssdk
this.innerAudioContext = uni.createInnerAudioContext();
this.innerAudioContext.src = '音频路径';
this.innerAudioContext.autoplay = true;
this.innerAudioContext.loop = true;
this.innerAudioContext.onPlay(() => {
    console.log('开始播放');
});
this.innerAudioContext.onError((res) => {
    console.log(res.errMsg);
    console.log(res.errCode);
});
jweixin.config({}); // 模拟签名
let that = this;
jweixin.ready(function() {
    WeixinJSBridge.invoke('getNetworkType', {}, function(e) {
	that.innerAudioContext.play();
    })
})

参考这个试试呢

https://blog.csdn.net/weixin_44064067/article/details/125444265