首先推荐的是一款插件 Aplayer

简单使用方法：
将其在github上的源码下载下来，解压后将其dist文件夹放入 themes\next\source（next为你正在使用的主题）然后新建themes\next\source\dist\music.js 文件
添加内容：

const ap = new APlayer({container: document.getElementById('aplayer'),fixed: true,autoplay: true,audio: [{name: "红玫瑰",artist: '陈奕迅',url: 'http://fs.open.kugou.com/56e53ea37edef5c0efa88de2486232aa/5cde6a64/G008/M08/07/17/SA0DAFT-vDKAVnOvADqfOLPG3ig724.mp3',cover: 'https://gss0.bdstatic.com/-4o3dSag_xI4khGkpoWK1HF6hhy/baike/w%3D268%3Bg%3D0/sign=559398238b025aafd33279cdc3d6cc59/4a36acaf2edda3ccf85966c308e93901203f9290.jpg',},{name: '50 Ways to Say Goodbye',artist: 'Train',url: 'http://fs.open.kugou.com/c2d9326eb7e4636ebbabeb1a716d1434/5cde6e70/G008/M05/0F/0D/qIYBAFUPK_uAUi_TADy0h6Awamk850.mp3',cover: 'https://upload.wikimedia.org/wikipedia/en/thumb/6/69/Train_50_Ways_to_Say_Goodbye.jpg/220px-Train_50_Ways_to_Say_Goodbye.jpg',},{name: '天份',artist: '薛之谦',url: 'http://fs.open.kugou.com/7225d7673398e4cc24c7d2bff4714a8d/5cde6f44/G111/M05/02/17/rw0DAFwgjH-AI3GZADyYcnfL7lU771.mp3',cover: 'https://gss3.bdstatic.com/-Po3dSag_xI4khGkpoWK1HF6hhy/baike/w%3D268%3Bg%3D0/sign=e5df4849be1c8701d6b6b5e01f44f912/e1fe9925bc315c60ff049d4280b1cb134854778e.jpg',}]
});

如上，具体信息可查阅Aplayer的中文文档

由于在添加音乐的同时需要外部音乐链接，在此推荐一个神奇的网站https://music.liuzhijin.cn/