Listening to music everywhere

I don't understand music at all, because I cannot play (the) piano or any other musical instrument(s=delete). Is that true? (But=delete) why is it that when you are listening to music, you feel sad/happy/motivated/disappointed? Even though you don't know how to play (with=delete) music, you can still understand music.

When you (are)hearing a happy song, you feel delighted, and you don't need to know what the lyrics exactly are (exactly what the lyrics are 好一点). I think that's why many people say (that) "music is the common language of human beings"

I liked listening to music very much when I was a high school student, and(but) now it is not (like=delete) that much, I don't listen to music every()day but every other day or sometime(something) like that. I can hear when I want to listen even there is no sound in the environment; I cannot hear if I don't want to listen to that. 这一句我不太理解，你想说你听音乐的时候不喜欢周边有别的声音吗？So sometimes I sing in my mind instead of listing(listening) to (the=delete) mp3(s) :P

And the type(s=delete) of (the=delete) music that I like have(has) also changed a lot with (the increase of=delete) my age. For example, I liked rock when I was around 16-18, that was one way I released myself from the pressure; but now (I don't know since when) I no longer listen to rock music, because I feel uncomfortable when I listening(listen) to rock, I feel it (is) annoying and messing(messy). That's a quite strange transition. Instead, I prefer pure/classic/Buddhism(buddhist) music rather than rock or pop, which(because they) make you(me，应该说你吧，因为不知道别人会有什么感觉) feel peaceful and harmony in your deep heart(deep in your heart). 你说in your deep heart 这个意思就是在你深深的心里。。 :-)