On the Subject of Nonagon Infinity
Front-to-back-to-front-to-back instructions not included.
On the module a piece of encrypted text is displayed, along with four buttons with letters on them.
An (incomplete) excerpt from a song within the album Nonagon Infinity is picked.
The excerpt may either be Caesar shifted with a random key or Atbashed, may randomly be reversed, and have its spaces removed and randomly readded.
Decrypt this excerpt, and find the letters before and after this decrypted excerpt. Press the buttons with those labels in order.
NOTE: Sometimes the lyrics can bleed over from one song to another, including from the last song in the album to the first.