Underbase: Fallen Down -

: Written in the key of D Major . The intro specifically starts on an F# note.

To understand the foundation of "Underbase," it helps to know the original's structure: Underbase: Fallen Down

If you are looking to play the theme yourself, several resources provide tutorials and tabs: Fallen Down | Undertale Вики | Fandom : Written in the key of D Major

: In Undertale , this theme plays during interactions with Toriel in the Ruins. Learning to Play Underbase: Fallen Down

: It utilizes the robotic singing style of the DECtalk speech synthesizer.