it's not just math though. Drummers like Tain, Vinnie, Ari, Hass, Humphrey and others use it as a color. It sounds uneven it's great way to set up certain things in a song. For example this is one thing Tain and Hass do a lot in their jazz playing.
If you're thinking in a "2's and 3's" breakdown of rhythm, they'll take a two and play a 5 or 7 over it. I've seen Hass play 9 over 7 by placing a five over the first to half notes(1,2,3,4)(5:2) and then a four over the last 3 quarters(4:3), creating a 9. Weckl never uses that kind of coloration. I love guys Dan Wiess, Joel Taylor,Hass, Tain and prolly some in here, that use rhythms like that to make music breathe differently.
Weckl, is undisputedly once of the greatest drummers in the history of drumming. I'm not comparing him to anyone as he's in his own league. I just mentioned these other guys as people who do use polyrhythms in a way where it doesn't interfere. And of course. VINCE..
