This was at a flooded retention pond at the airport. I recorded these while I was waiting to board my plane home.
It is tough to be 100% sure of all the species present, but I am sure there are
Litorea caerulea - the low croaking "bark"
Litoria rothii - the chuckling laugh
Litoria nasuta - the quacking background call
The loud ascending synchronized calls are insects, I believe.