[quote=“” babagali""]
so in this system each bank will have 4 different songs with totally different sounds and so?
[/quote]

That’s one way of working & it makes sense as you have 4 Parts per Bank. So think of it as 4 Kits.
Patterns 1-4 Part 1
Pattern 5-8 Part 2 & so on.
You really have to decide for yourself what works for you though.
Some people want to program evolving Patterns & can easily use a full Bsnk of 16 on one song. That suits the composer approach.
I prefer a skeleton to work with & add things on the fly. So 4 Patterns per Song is plenty for me in this scenerio.