If you combine "GBA Mus Ripper" and "SoundFont MIDI Player", you can get some seriously excellent sound for listening to GBA music.
"GBA Mus Ripper" detects the so-called "Sappy" music driver and extracts and converts the songs to MIDI files, and generates a SF2 soundbank file. Available at https://www.romhacking.net/utilities/881/
"SoundFont MIDI Player" plays back MIDI files. You can configure it to automatically load a SF2 soundbank file in the directory. When you load a converted GBA MIDI file, you get the high music quality of a modern feature-packed MIDI playback engine. Available at https://falcosoft.hu/softwares.html#midiplayer
It's not perfect though, as GBA games do not use true standard MIDIs. Some MIDI controller commands (like modulator wheel) don't translate correctly.
Thanks for this, I was not aware that a good portion of GBA songs can be exported as MIDI. But I'm guessing that with good soundfonts you can get pretty reasonable quality for many of them!
They don't use general midi standard instruments. You need the extracted soundfont because the instrument numbers are unique to each game. In order to "improve" the soundfont, you need to edit that soundfont to have higher quality instruments, you can't just switch out the whole soundfont for a different one.
"GBA Mus Ripper" detects the so-called "Sappy" music driver and extracts and converts the songs to MIDI files, and generates a SF2 soundbank file. Available at https://www.romhacking.net/utilities/881/
"SoundFont MIDI Player" plays back MIDI files. You can configure it to automatically load a SF2 soundbank file in the directory. When you load a converted GBA MIDI file, you get the high music quality of a modern feature-packed MIDI playback engine. Available at https://falcosoft.hu/softwares.html#midiplayer
It's not perfect though, as GBA games do not use true standard MIDIs. Some MIDI controller commands (like modulator wheel) don't translate correctly.