I'm rearranging a piece of mine from 12/8 to 4/4. This works pretty fine for the harmony since those were arpeggiated chords, 4 groups of 3. But I notice the melody is rather complicated to transfer to 4/4, and I've found out that what works best (musically) is that it alternates between 2/4 and 3/4. But this is only for the melody, not for the harmony which is still 4/4. Now since this is for piano, obviously I'm wondering whether people can count like that: 2 different rhythms at the same time (I know I can't, but I can't play piano anyway) I.e. is this playable?
Or will pianists want to kill me?