MDPE.Application:4.4 - Extend the phrase while preserving a chosen action relation

Suppose a later arrangement has a twelve-pulse span and still wants a block of right-hand attacks followed by a block of left-hand attacks, with the same three-pulse gaps at the two transitions. Stretching every old interval by 1.5 would move the attacks off the new unit-pulse grid. Adding four rests would keep the old onsets but break the chosen transition spacing. Neither operation supplies the requested relation.

Use chapter 32’s splice instead. Cut the eight-pulse motion after position 3. Copy its four-pulse transition segment at original positions 2–5, then insert that copy between the two halves:

first half       inserted transition    second half
R l R l          R l r L                r L r l

new positions:   0 1 2 3 4 5 6 7 8 9 10 11
new motion:      R l R l R l r L r L r  l

The result has right-hand attacks at 0, 2 and 4 and left-hand attacks at 7 and 9. Its cyclic gaps are 2, 2, 3, 2, 3. Five attacks replace three, the span becomes twelve, and the selected hand blocks and three-pulse transitions remain. Inserting an even number of pulses preserves the parity of the shifted hand motions. This is an explicit preservation claim about this construction, not proof that every stylistic or perceived quality survived.

The new part still needs its relation to the revised accompaniment and the performer’s capability. If the accompaniment actually keeps an eight-pulse landmark, the twelve-pulse construction is not an adequate replacement merely because the arithmetic works. Retain the eight-pulse part or reconsider the joint arrangement. If twelve pulses are intended, try the new part with those receiving landmarks and compare the audible transition, effort and entry rather than declaring a score of five attacks more complex or better in every sense.