Looking at this now, it was the Organ. It's off with the piano, the notes are. Then with the organ there should maybe be a deep sound, not bass wise but like a deep brass in the background to bring out those pianos. The pianos are what give it that 'trippy' sound that lovesosa was talking about. Maybe even transpose the notes for everything down to make it more trap. Cause when you said the word Trill I thought of Bun B but that's the only rapper I know that even refers to that lol.