Licensing Gray Area
These files have an unknown license, were obtained from unkown sources or were compiled from third party material.
Extra considerations:
All samples are propierty of Roland Corporation, dont sell this soundfont, dont do commercial music with this soundfont, dont monetize your views with this soundfont
except of all that, you can do whatever you fkin want, like adding to your free soundfont or for making youtube videos of videogame music