Casting to Chromecast

[AaronJames23]

So I recently just got my own Chromecast (2nd Gen, the round one), and I want to be able to cast my music when I go to bed, but for some reason, on my iPhone, iPad, and Macbook Pro, I can't seem to find the Chromecast to stream to. Everything is on the same Wifi connection, I've tried restarting all of my devices, including the Chromecast itself, and I'm still having no luck. Someone please help!