Vocaloid is synonymous with thumping electronic beats and high-pitched, computer-generated vocals. The best songs to use the vocal-synthesizing software apply this format to a variety of music styles—hardcore techno, energetic pop-rock, midtempo power ballads—and highlight the full range of Vocaloid voices, from GUMI and Megurine Luka's lower-pitched tones to Hatsune Miku's iconic chirp.