Does she have any say in how intense the Deepsong is, or does the Empress have her own schedule for that? Her visits to the Deepsinger haven't necessarily coincided with the end of one mingle/beginning of another.

For that matter, if she led a group of mermaids to the Deepsinger, would there be any way for her to stop it from Singing to defend itself, if the Empress' will is superseding its own? Is the Deepsinger itself likely to resist, or try to?