This is an awesome find, and one that’s well-worth trying out if you’ve already dug deep into the many, many secrets / Easter eggs of Sonic Mania.

There are more codes, some that still haven’t been quite identified, discovered by the Sonic Maniacs over at Sonic Stadium. These particular codes were shared by Youtuber extraordinaire GameXplain.

They’re all weird, silly, or fulfill a long-demanded fan request (yes, you can finally disable Super Sonic’s music) - basically, it’s Sonic Mania Plus in a nutshell. Sonic Mania Plus is just full of mysteries, and now you can play around with even more hidden features with these Sound Test “cheat codes” - maybe they’re closer to Easter eggs, because most of these effects aren’t going to help you beat the game.