I've been messing around with this online MIDI player that allows you to use custom soundfonts and ALTTP soundfont somehow works perfectly for every VGM I use.

Here's the Palma overworld theme using the LTTP soundfont.

https://spessasus.github.io/SpessaSynth/

Phantasy Star - Motavia Overworld (LTTP Soundfont)

Phantasy Star - Dezoris Overworld (LTTP Soundfont)

Phantasy Star - Tower Theme (LTTP Soundfont)

Phantasy Star - Final Dungeon (LTTP Soundfont)

Phantasy Star IV - Dezolis Town (LTTP Soundfont)