Siralim old music

When i was watching twitch streams, I noticed the soundtracks from Siralim 3 are used for the old realms. Will the old realms get brand new soundtracks during the beta phase or stay the same as in the previous game?

I also wanted to say all the realms look great( Arachnid Nest needed the change because the color pallete made it confusing to search for the spider babies and eggs).

The realms from previous games will keep their Siralim 3 music. Only new realms will get new music.