It's not a song that was originally designed from the beginning, but a song that became a Jazz arrangement for technical reasons when playing in the game of Final Fantasy 14.
Since it can only be played as a single note in the game, it was created by using two tones, a bass and a melody, which were shifted by a few ticks. On top of that, the Jazz arrangement was just convenient.
For the time being, this song was recreated to a level where you can listen to it normally.
However, it is quite rough, such as not adding velocity strength.