Kasane Teto (重音テト) was originally created as a troll "Vocaloid" by fans. Now she is a well-known synthesized vocal character for the free software UTAU, in some cases being more well known than some of the Vocaloids. Her surname 重音 (Kasane) has multiple meanings, which are "Piled-up Sound," "Double Sound," and "Heavy Sound." Her name テト (Teto) comes from Tetopettenson, a parody song of Le Beau Tambour. Although her voicebank is only for use in UTAU, many people still mistake her for a Vocaloid.