Vocal Tune demo input

"Twinkle Twinkle Little Star - sung with full lyrics.ogg"
Singer and uploader: Dcoetzee (Wikimedia Commons)
Source: https://commons.wikimedia.org/wiki/File:Twinkle_Twinkle_Little_Star_-_sung_with_full_lyrics.ogg
License: CC0 1.0 Universal (Public Domain Dedication)
https://creativecommons.org/publicdomain/zero/1.0/

The demo uses the first line only ("Twinkle, twinkle, little star"), trimmed,
mixed to mono at 44.1 kHz and lowered about 40 cents, then processed by the
kit 018 Vocal Tune engine. No attribution is required; it is given as a courtesy.