I like to keep the alarm at a low volume, with some classical music, nothing too jarring.

结构分析：

I like to keep（谓语动词） the alarm （宾语）at a low volume（宾补）, with some classical music（方式状语）, nothing too jarring.（music 的同位语）

【翻译】我喜欢把闹钟调低音量，放一些古典音乐，不要太刺耳。