Well, I very suddenly became a dad last night (a healthy girl), so I don't have any clue what this will do to my posting frequency. I'll do my best to keep up
You can leave the fountain and head down either of the corridors or try and interact with the water spirits. The chanting is coming from upstairs somewhere. You see no way to get upstairs however.
I guess if Sabynha's singing doesn't work, we might try making the crystal goblet ring by flicking at it. If really desperate, we could show how 'amazingly' talented we are with crystal goblet wine glass music (with water from the fountain).