I am streaming , how can I play music when provider goes down.

I have Google Fiber with Google mesh router and access points.

One disturbing feature I recently discovered is that when the WAN goes down with the new router, so does my LAN. Makes no sense to me and in my 25+ years of broadband internet and 35 years of Network Admin duties,  I've never experienced this. Needless to say, no LAN...no access to my file server. At those times it's great to have my Vinyl and CD collections.

I'll be contacting Google to see if there's an option to allow LAN to stay up when internet is not present.

I think a good ukulele is clearly the answer...easy to learn some chords and play anything including hip hop and EDM. Ukulele EDM? Nothing quite like it. Impress your friends with your resourcefulness and remember, you can buy one hell of a uke for whatever your internet based hifi cost.

Xfinity - goes down more than a $20 hooker on payday. That is an intentionally crude statement in hopes Comcast might realize how embarrassingly poor their service level is.

Our xfinity service is quite good. It must be where you live that determines the quality of service. 

I have had the same issues due to Roon's regular and sometimes prolonged outages. I have a BluSound Vault that has my 1000 cd collection loaded into it that though on the network is controllable via my phone and I'm certain I've used it for playback when the internet or Roon are down.