It is seen when you are very happy you listen happy music, fast music, dancing number etc. at that moment sad song do not work or liked. when you are taking rest Gazals, slow songs, some sad song work better. when you are in a social gathering some romantic, climate song, national song is liked. At you private moment couple like romantic and sexy songs. When any body is sick some moral songs, hope songs, songs full of enthusiasm, song having love with life can cure early to a sick people along with his treatment. When we hear a condolence then very sad, hopeless songs are liked but at that moment some inspirating song should be listened after few days so that new energy to live the troblesome life can be achieved by the people behind one.
Music, good music can give peace and pleasure. It can show you heaven.