Ps1: Bios
The infamous Sony Computer Entertainment logo, the sound, and the final "diamond" splash screen are all rendered by the BIOS before a game loads.
For many players, the DuckStation emulator provides the best modern experience for handling these files on Android, usually requiring the file to be placed into a designated folder to load games properly. If you'd like, I can: Bios Ps1
Show you (and how to dump your own).
If you are setting up emulators (like PCSX2, which also runs PS1 games), you will likely need one of these ROM files: North America (US) SCPH-1002: Europe (EU) SCPH-1000: Japan (JP) The infamous Sony Computer Entertainment logo, the sound,