We just recently bought a house and it had a house-wide lifestyle sound system. We wanted to make use of it, but it's pretty dated and only uses cds and things like that. I had the idea to use a chromecast audio to modernize it. I thought that maybe I could connect to the aux input with an rca to 3.5 mm adapter. I was able to get it to work when I just plugged my phone in, but when I tried it with the chromecast audio wirelessly connected to my phone, it would work. Is there something else that I would need to do? Or is it not possible?