"The Rhythm Revolution q" let multiple of the 9 be consistent with the other notes.
9
against 4 made possible to express in unusual way such as 18 against
4, 27
against 4, 36 against 4 = 4 x 9-tuplet, 54 against
4, 72 against 4 = 4 x 18-tuplet and so on.
*
All the numbers with underlines are multiple of the
9 .
All
of them are compatible with current rhythmical form such as 8th notes,
triplet, 16th notes, 6-tuplet,
32nd notes and so on in any way.
This consistent point
of the 9 to
the other makes itself much different from
"5" and "7."
Please
listen to "Airborne Babies MIDI" as a sample (it's on the top of this page).
You should play the
cymbal part along with the MIDI by your hand on your knee or somewhere.
You will easily feel
the fun.