I forgot to mention the particular staff I'm wondering about is the Sanguine Rose. And none of my characters have quiet casting now. Don't want to get all the perks if it doesn't work.
Hrmmm.... this one might be a special case since some summons are self targeting. (why casting an attronach spell sometimes fails if you don't beat your own magic absorption level)
It would be nice if someone could try this specific item with quiet casting.