Kasane Teto
Kasane Teto (重音テト) is a Japanese (and later English) UTAU who was originally created as a troll "VOCALOID" by fans. Her surname 重音 (Kasane) literally means "heavy sound" or "overlapped sound;" while these interpretations are widely accepted among fans, TWINDRILL has not released any announcements about the meaning of the name. Her name テト (Teto) comes from Tetopettenson, a parody song of Le Beau Tambour.
Although her original voicebank was only for use in UTAU, many people still mistook her for a VOCALOID (and still mistake her for one to this day). Though she had no final voicebank released for the VOCALOID engine, Teto had a private voicebank with Crypton Future Media, Inc. and there were attempts to release her for VOCALOID in collaboration with AH-Software Co. Ltd.. She later was to be released with a speech voicebank for TALQu in January 2022, an AI singing voice database for Synthesizer V Studio in April 2023, and an AI text-to-speech voice library for VOICEPEAK in April 2025.
Her voice provider is Mayo Oyamano.
