Level 1: the beaming shows three arpeggio
domains. There is one passing tone.
Level 2, the passing tone is omitted, the domains are show
as simultaneities. The middle domain functions as a link between the
first and third domains. Passing tones lack stems and neighbor
tones have stems.
Level 3: the middle domain is omitted because of its linking function and the remaining domains
are consolidated into one simultaneity. The middle domain is considered
a prolongation. Why?