First time i am hearing this. The are the "chords" in the tabs. Sounds like a bit more going on. Maybe you can hear more out.
Sounds a bit to me, like the keyboard is playing the same as Guitars.
Ok i just wanted to try Music Stems with Logic Pro on my iPad. Since mine doesnt have an M-Processor i dont have that option.
Now i found out that Audacity can do this quite good with an Plugin called OPENVino Music Separation: