ABSTRACT
The second type is what Cooper and Meyer (1960, p. 30) call a “closed trochee”. A subtree separated from a preceding longer note and forming an upbeat to the next metrical accent (Figure 9a) can itself have closure that counteracts the previous separation and suggests an alternative grouping (Figure 9b), particularly in conjunction with other characteristics. Such rhythms may be seen as inherently ambiguous in respect of phrase grouping.
