For a mutual friend's wedding, a cellist friend and I (violin) are trying to adapt Ludovico Einaudi's "Divenire" for the groomsmen walking in (as it's the groom's favorite song as of late), transitioning to the unofficial Korean national anthem, Arirang, because the bride is Korean and has specifically requested this.
Divenire is in A minor. The arrangement of Arirang we're playing is in... G major? (It goes D E D E G A G A B A B G E D.) The thing is, I don't know if this should be considered a different, "Asian" kind of scale. Because something about the missing Fourth and Major 7th makes it not "truly" sound like a major key to me.
Where I'm running into trouble is writing a transition from Divenire to Arirang. We don't want to change the key of Arirang, so I transposed my arrangement of Divenire from A minor to E minor, thinking E minor and G major should be doable. Like, we'd loop a bunch of whole notes at the end of our Divenire that transition the mood, until the first bridesmaid walks in, and then we begin Arirang from a violin solo.
But no matter what I try, E minor doesn't seem to go into this particular "brand" of G major. And I have a strong feeling it is connected to the missing Fourth and Major 7th because when I add those into a more "westernized" version of Arirang, the transition is easy.
Does anyone know what concepts I'm missing, and if there is a known way to do these kinds of transitions?