Haha. Good one. When you create a "derivative work", such as changing the pitch of copyrighted music, it is actually slam-dunk evidence of intent to avoid copyright. So, not only is it a copyright infringement to create one, by posting (publishing it online), you will have committed at least TWO copyright infringements (derivative work, publication, public performance), and provided all the evidence they need to sue you instantly. It's like going shoplifting and being caught on camera putting merchandise in a secret bag under your clothing: it's clear evidence if intent to steal (misdemeanor), if not also "burglary" (breaking and entering a building with intent to commit a crime), which is a felony in many states.
18 USC § 2319 felony copyright infringement