So as far as I could figure it out, in AU you can only set one side chain per track, and on more complex projects that is not practical. For example you have 4 vocal tracks rooted to bus 1 (vocal bus) and you set side chain to music track. Now you have ducking effect, but what about sound effects?
I usually side chain them so that SFX don’t overpower vocal, especially explosion ones, and only thing I could do is to root bus 1 (vocal bus) to second bus (Vocal bus 2 or SFX side chain how ever you want to call it) and than make new side chain for SFX bus and control them that way.
I hope you understood what I’m saying, my question would be is there any way to add more side chain slots?