FFIX share's same instruments as FFI(PS1/PSP ver)?

[JLCL00]

Apologize if my title, or the overall topic, seems a bit ignorant (I might be thinking of a "sound card", "in-game instruments" or "chip", instead) although I probably shouldn't say that since that's why I am here to ask you all.

While this might be better for the FFI-FFII or the overall FF section, I decided to ask this question here seeing as how there might be a better chance of someone of FFIX knowledge who may know more info about this.

My main question is whether the PS1 version of Final Fantasy I uses the same instruments as Final Fantasy IX. When I say "instruments", I am talking about something similar to midi or a "chip" (although this maybe more applied to pre-N64/PS1 games).

I'll give you a few examples from FF1's OST:

Gurgu Volcano
Deep Place
Town

Please note that I am simply asking a question due to my curiosity about both the game's music; nothing negative. This may also apply to the remake versions of FFII although at the moment, I am curious about I and IX. I also realize that FFI may only use a small portion of IX's instruments.

Thank you.

[loaf]

They put songs from FFI into FFIX, the Mountain is one of them.