Newbie question re chirping

Let me start by saying I don't think this is a problem, but I'd like confirmation, lol! I've got six 5-day old BRs and they suddenly are getting more vocal. However, no one seems to be in distress, temp is right, there are no signs of picking at each other, and, uh, all systems are go go go!

For now they are in the master bath and this morning they actually woke me up. So I go in there (at 4 am) and they're just chillin' - hanging out, walking around, pecking at the floor of the brooder.

I assume this is just typical yap yap yap? It used to be meep meep meep but now I think we have moved on to the next level, ha ha!

Thanks, everyone!