const backgroundAudioManager = wx.getBackgroundAudioManager()
backgroundAudioManager.title = '语音提醒'
backgroundAudioManager.epname = '语音提醒'
backgroundAudioManager.singer = ' '
backgroundAudioManager.coverImgUrl = ''
backgroundAudioManager.src = 'https://xxxxxxxxxxxxxx.mp3';
https://developers.weixin.qq.com/miniprogram/dev/api/media/background-audio/wx.getBackgroundAudioManager.html
基础库 1.2.0 开始支持