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)

CC: @coolboymew

@coolboymew I didn't realize how easy it is. I'm pretty sure it's just as easy on some desktop MIDI program, but I can't find any good native ones for Linux.

I'm not a music expert at all. The only other music program I messed around with was pxtone Collage which is the program Pixel made to make the soundtrack for CaveStory and Kero Blaster. The only problem with that is that there is no MIDI support and no support for SoundFonts (only instrument samples stored as WAV files).