I've been thinking for a while what the best order to do this is. Say I route the seperate tracks from my mix into 8 seperate buses ready to use the Waves NLS to sum the tracks, would it best to place pi before or after each instance of the waves plugin. Would placing it after the waves plugin mess with how the NLS sums and vice versa. And what would be the best way to use pi on the individual tracks before feeding them into the buses?
PI is not intended to be used on buses, subgroup, auxes etc. but only on actual audio tracks, where it needs to be the very last on each track, no matter what's going on before in the plugin chain. it's all very clearly stated in the manual.