well written description of differences

as you said Every possible 8 or 12 note melody (on a standard scale, anyways) fits in 601 GB and these combinations are natural occurence and they are placed under zero copyright, shouldnt this apply to google product or even to the original songs- u know since there is finite number of this combination ppl can come with sam or similar idea completely independently, also many songs have already similar melodies for whatever reason

there should be no copyright for just the melody but for song a whole