anyone explain the RPGMV_MXX.ogg files in GENE?

So I am out of the loop and questioning myself since it been a while since I last check the community during the production of 3 game projects as well school work to notice after purchaseing humble bundle activating GENE that I notice RPGMV_M01 - 04 ogg files that look like part of the base package or some form of a package i am unaware of.



search far and wide to know where those music files originate since I don't even know if it part of GENE or some additional music pack added to MV previously. if anyone have any ideas where it actually came from since I don't see any from the GENE store description there is additional music for GENE purchasers?

Edit: give me a info if there is a lot of official stuff (except paid DLC) I missed over a year or 2 (probably after the previous IGMC) Since I stopped getting newsletters for some reasons and some state they are getting additional files for RPG maker software via newsletter which I didn't get any recently.