The creepy message from Sonic CD that can be accessed via the Sound Test mode. The message roughly translates to: Infinite Fun with Sega Enterprises, Picture by Mazin.
To access this message:
Press Down, Down, Down, Left, Right, A on the Title Screen to get to the Sound Test.
FM 46, PCM 12, DA 25 and then push Start.
You should be presented with this screen, hit Start to exit.
Note that it does not loop correctly on emulators due to the fade-out and the fact Sega CD emulators do not support it properly, for some whatever reason.
The music played is the boss music regardless of where you are.
