Singing differs by region in that a high falsetto is used in the north while in the south a lower range is used. "To the unfamiliar listener, Indian singing sounds exotic, different, and difficult to comprehend," and the contrast in the quality or timbre of voice used in traditional Indian and European musics may have much to do with that difficulty. However, "to the trained ear, melodies flow, ascend and descend" while dancers react to changes in the structure of the melody and the song. Boye Ladd says, "If you give me a stink song, I'll dance stink. If you give me good music, I'll give you a great show," implying that one can appreciate the music through the dancing, which is readily appreciated by everyone. But others say that today's contemporary contest dancers are expected to dance their best no matter how well or poor the drum group is that is singing for their contest. Generally, Native American singing follows a pentatonic scale (as if playing only the black keys on a piano) and while, to the outsider, it may sound like we're just pounding a drum and going "Heya-heya-heya-heya" sometimes there are actual words in Cree, Pikuni, Lushuutsid, Niimipuu, Lakhota, Sahpatin, Salish, Ojibwemowin or many other Native languages.