Um, so seed "NEIN NEIN NEIN NEIN" (297970094) & "EIN NEIN NEIN NEIN" are silent. This seed is the only silent one I've found (its neighbours are pretty cool though).
"NE NEIN NEIN NEIN" & "NEI NEIN NEIN NEIN" are actually pretty nice tunes, though.
And "HOW ABOUT A LITTLE JAZZ" (868837680) is most definitely not jazzy. "how about a little jazz" is more of a Castlevania battle theme than anything.