The fan base has gone a long way with emulation. In the early 2000s, they came up with 'extracted game music' (a.k.a. chiptunes). They extracted the programming of the music from every classic video game and built digital soundtracks with them. With special music players, you can play these music files as if they were MP3s. And they're far better quality than MP3 because it's the actual programming of the song that you're listening to! In this realm, PlayStation 1 music is under the 'PSF' file format. Music players that support PSF can be found on any device: Windows, Android, iOS, Mac, and Linux.
My favorite feature about this music is how small it is. SaGa Frontier's PSF soundtrack is around 600 KB while an MP3 soundtrack is around 500 MB! So you could quite literally have hundreds of classic gaming soundtracks on your iPhone or Android phone, and barely make a dent in your phone's storage.
If you want to learn more, read my tutorial for Extracted Game Music. My tutorial also provides links where you can download PSF music; in those libraries you can find the soundtrack for SaGa Frontier (and its sequel). Extracted game music can be converted to MP3, too. My tutorial provides directions on that process.
