Voice.-It looks the most effective instrument of all. brilliant voices by Opera artists, moody oice by Jazz singers. Or children's beautiful voice. People sometimes go to Karaoke and sing out of tune.It's just funny and happy thing. Flutes are also  great musical instruments with tecniques. From ancient times,people live with music.Voice,flute,drums are the most primitive and effective way to enjoy music. Everybody love music, as well as love peace world.