A student brought in a copy of Chuck Silverman’s Practical Applications: Afro-Caribbean Rhythms for Drum Set, and we worked through a part of it together, dealing with metric modulations— or more accurately superimposed metric modulations (Vinnie Colaiuta’s term).
It means an illusory tempo/time change while remaining in the original meter. It’s a drumming hot topic; as a musical device it’s mainly a trap, a bad decision. But it’s worth pursuing a little bit to learn something about rhythm.
Patterns 1 and 2 are warm ups; line 3 is the pattern as it appears in Silverman’s book. Lines 4-10 are my own variations, making some basic funk rhythms, superimposed.
As an exercise, you could play four measures of a simple half time feel groove with the same cymbal rhythm, alternating with four measures of the above patterns:
Try it along with a Afro 6 type loop— here’s a reasonable-tempo one, and a faster one.
Here’s a similar page I wrote in 2019.