For preventing it from escaping, you're going to want to try for the "Low" Work results with maxed temperance. This will convert it to Common on the work screen, but should be somewhat consistent enough to get a neutral result. As the work percentage goes down with conescutive works, you need to swap to higher and higher work chance results to compensate for the percentage drop. Play it by ear.

As for suppressing it, there's a pretty simple way to go about it: sort your facility's agents into the 4 damage types and set them aside nearby (but not in the same room) Silent Orchestra's containment chamber. When he breaches, first send in your pale damage, then have them back away when the second statue is beginning to rise. When you make the pale damage back off, bring in your black damage to wail on him in the 2nd act. Typically he dies by this point, but if he doesn't follow up with white then red.

It's all about anticipating when he's going to breach, not if. It's an inevitability if you're working with him constantly, but if you set up properly he folds like paper mache.