im not sure wt u mean do u mean add a sound effect to these piano parts?
as for the slider speed, these sliders are meant to bring out the drums,(so maybe these sliders will fit? idk) and if i slow down the speed, im having trouble styling the sliders, and this whole section here is going to be boring
im sry for asking so many questions about ur suggestion. if these questions are really serious to u, i will try my best to modify them :(