What tools do you have spend lisening to listening to music?

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With science and technology developing fast,the music player is generation after generation update.So what tools do you have spend listening to music and which do you think is best?? In junior high school , i use walkman. in high school, i use CD and MP3,but most times i use CD. Now in college ,i use MP3 because it's convenient. My favourite is CD player because it has good sound quality. There are so many music player,such as MD ,MP3 and so on.What about you?