Encyclopedia — Some of Toby's notes to 8-4 during the translation
I deeply believe that Toby made 10 songs and remixed them into the entire OST. (Sorry for the terrible quality, my PC bricked and I'm stuck making memes on my phone)
Undertale
What song plays over Tale of the Nine-Tailed Ep 2 end credits – a sweet old-fashioned jazz-infused track – Leo Sigh
Alphys's Laboratory, Undertale: Reset of Time
Toby Fox: sans is hella lazy to be in a relationship, Also Toby: : r/Deltarune
Toby Fox - Undertale full OST - all songs (2015)
Toby Fox
A Toby Radiation Fox Game, Undertale
Toby Fox - Undertale full OST - all songs (2015)
Toby Radiation Fox, Diary of a Tourney Kid Wiki