How to reproduce Building Blocks Synth apple loop

hi, a very specific question that you cant answer unless you listen to sample in question - a sample in LPX apple loops called Building Blocks Synth. There is a bass line and a recurring synth chord which closes out every time it appears I think with some kind of filter effect - a bit like a closing hi hat on a plucky synth - a sound I just think is fantastic, but for the life of me cannot work out how it is done. If you get a chance can you cast your expert ear and for those experts , let me know how you think you get the synth sound and effect. You can hear it better if you copy into a track and boost the high end and low end EQ .

I would not normally ask such a question on here but it is bugging me and I could spend my life looking at tutorials to try and work out what it is but not get there.

Many thanks in advance for anybody who takes the time to listen to it.

A related question if anyone happens to know: if I include the loop in a song and successfully commercialise it, is it royalty fee?