Polymeters on Tempest:
OK, it might be a bit quirky, but it does work for some polymeters.
You can use other time signatures than 4/4 to get some polymeter action. Try using 12/16 @ 2 bars. You can now do 3 over 12 and 6 over 12 for instance.
It's pretty basic, but it does work
. I have not tried other combinations yet, but maybe 5/16 @ 8 bars could also work for instance. Programming sequences like this is pretty quirky though
The basic idea is using other time signatures and programming 4/4 beats within them.