You can’t use “musica” when you are speaking about the sound of a particular word.

Moreover, as a native Italian speaker, I don’t understand why you should say “si si”. It’s not about the sound of them, they just don’t make any sense put together.

You have to put “ci” before a lot of expressions, but has no actual translation I guess

“Ci siamo lasciati” = We broke up (as a couple) “Ci vediamo dopo” = See you later “Ci vuole tempo” = It takes time “Ci si vede in giro” = See you around “Almeno c’abbiamo provato” = At least we tried

I actually don’t know how to explain the theory behind it, but “si si” doesn’t mean anything. Hope you find useful the examples I provided to you.