Time signatures, pattern length, Unison

Hey guys, there are 2 things I’m looking for more in depth videos/explanations of. If you’d be so kind and point me to the right places I’d be most thankful.

  1. Time signatures, pattern lengths and all that entails (the setup for that is quite confusing on both the DN and DT) - the manual isn’t too clear on that…
  2. Unison on the DN.