NES Music (Purist):
https://drive.google.com/file/d/1iPnTZTnrB0kopLr8UtQqZEXotXrh_EGh/view

*Purist version contains no additional tracks found outside the original NES release. All tracks are either brought back to their original forms, or given adequate substitutes.

NES Music (Enhanced):
https://drive.google.com/file/d/1VySZUvyDAxBIr7whfJ3fZZfj0wkplbWK/view

*Enhanced version contains custom NES tracks created by Leviathan Mist and used with their permission. These tracks include the church, miniboss, fiend battle, and final battle themes. All other additional tracks are given adequate substitutes from the original soundtrack.

Origins PS1 Music:
https://drive.google.com/file/d/1xi23nEY51_yLhOnUaCecko7HT9Ng3Vs-/view

In the root of your FFPR directory, make sure you overwrite with the included custom UnityPlayer.dll, if you don't already have it. It's required for almost any mod.

Then simply overwrite with the included .bundle file in the indicated location as per the included file structure.

That it! Load up the game and enjoy.