Hi,
I am working on a version of The Small faces, Itchycoo Park, it was a hit once.
In the, I suppose you could call it a chorus part, there is a flanger/phaser effect on the drums.

I have managed to add a flanger to the drum and organ part, this was easy.
However, I can't see how to control it so that it doesn't play in the rest of the song.
In short, I need to turn it on and off in various parts of the song.
Does anyone have any experience of doing this that could help please.

Regards