This guide is for those who have unlocked the Sound Test page through Time Attack and need help figuring out the codes. If you havn't unlocked it yet, there's some brief instructions below.

To unlock sound test all you need to do is head into Time Attack and have the Special Stage total time under 4 minutes, here's an example:

If you're have higher than 4 minutes, don't worry, just try again.

Once that's done, all you need to do is go to the menu and go down to extras and select "Sound Test".

This first code includes a picture of Sonic, Metal Sonic and Eggman/Robotnik on a stage playing music with the caption "The Fastest DJ, MC Sonic. The code for this is PCM 03 DA 01, here is what it looks like:

This next one shows a cute looking Sonic. The code for this is PCM 11 DA 09

Here's an interesting one, this shows Sonic looking a lot like Batman. The code for this one is PCM 04 DA 21

Okay, you guys should recognise this one, here's the infamous creepy message that lots of Sonic fans know. The code is PCM 12 DA 25 Use this with the US soundtrack for extra creepiness. "Fun is infinite with Sega Enterprises -Majin"

This next one shows Sonic in a desert themed level. This is an unreleased level known as Desert Dazzle. The code for this is PCM 32 DA 08

This one shows Tails next to a classic race car with the caption "See you next game" The code is PCM 12 DA 11 This code also activates debug mode.

Here's the last one, after entering the code PCM 07 DA 07, you will first see this:
After that, you will enter the Special Stage and you see yourself playing as Sonic or Tails in a stage with Eggman's/Robotnik's face in the background.

This was my first ever guide on Steam, so from the bottom of my heart, thank you so much for reading <3