The volume of background music determines how you configure it. If there is only sound, you can buy a ceiling speaker, the sound quality is slightly worse, that is, pure tone. Of course, if it is better, you can buy JBL or BOSE ceiling lamps. If you want to turn up the volume and get high in the middle of the night, you can buy a professional stereo. If it is 100 flat, 2-4 speakers are enough. If you need excitement, you can buy two more subwoofers. You can buy PHASOUND audio, which is cost-effective and effective.