The Rosslyn Stave Angel - Music Cipher

An angel/music cipher that points out 3 notes of the music
to The Rosslyn Motet accounting for 70% of the entire cube sequence. It
is so subtle a decoy that you are supposed to think it is a musician
playing a Harp or Psaltery, but when you look in detail, he is actually
pointing strategically at 3 different lines and spaces of a stave of
music. Referring to the first 3 cubes rising above his head.