It appears that Mistress Ezada Sinn is associated with a ritual or performance called "Goddess Ezada-s Bath." Unfortunately, I couldn't find much information on this topic, and it's possible that it's a niche or specialized subject.
The audio was a whisper layered over a subsonic drone that vibrated in Marcus’s fillings. He tried to close the window. The ‘X’ in the corner was gone. The keyboard was dead. The room around him—his cramped studio apartment—felt suddenly vast and cold. Mistress Ezada Sinn - Goddess Ezada-s Bath.avi