The effects of your bardic performance carry on, even after you have stopped performing.
Prerequisite: Bardic performance class feature.
Benefit: The bonuses and penalties from your bardic performance continue for 2 rounds after you cease performing. Any other requirement, such as range or specific conditions, must still be met for the effect to continue. If you begin a new bardic performance during this time, the effects of the previous performance immediately cease.
Advanced Player’s Guide. Copyright 2010, Paizo Publishing, LLC; Author: Jason Bulmahn.