New in version 1.1.
Multiply duration pair by rational multiplier:
abjad> from abjad.tools import durationtools
abjad> durationtools.multiply_duration_pair((4, 8), Fraction(4, 5))
(16, 40)
Naive multiplication with no simplification of anything intended for certain types of meter multiplication.
Return integer pair.
Changed in version 2.0: renamed durationtools.pair_multiply_naive() to durationtools.multiply_duration_pair().