Side-chaining to auto-duck

Hi - I have set up my music track set up to to auto duck to the host track. I have done this via setting up a side-chain. A client today wanted the music bed even quieter. How can this be done. I set it up in the method described in @Mike tutorial from Feb 2013. Thanks

@David you may wish to try out the Auto Ducking feature from Essential Sound in CC 2018. This allows you to choose the amount of sucking applied.