If there's one thing most fans would change about Dragon Quest XI: Echoes of an Elusive Agen it's the MIDI style music. It's not that the songs themselves are bad, per-say, it's just the instrumentation used is a little, well, jarring to some...
Modders to the rescue, however, as modder [LSSAH]Canzah brings us a brand new, absolutely amazing orchestral version of the game's score.
The songs themselves that have been modded into the game are actually official versions performed by the Tokyo Metropolitan Symphony Orchestra. These versions of the song, composed by Koichi Sugiyama, were not intended to be used In the game itself, rather in other media such as soundtrack releases.
There's no doubt though that these versions of the song are far superior and give the game the soundtrack it deserves.
There's a few different ways to get the mod and install it, but you can find a full set of instructions right here.