Question: For Christmas 2016, me and my dad want to do a Lightshow for our neighborhood with lights and **music**.

[![enter image description here](https://i.stack.imgur.com/s86mw.jpg)](https://i.stack.imgur.com/s86mw.jpg)
We have the lights set up, but the music is a problem. We don't want to put huge speakers in our garden because that would be very annoying for our densely populated neighborhood. 

So, we came up with this concept:

[![enter image description here](https://i.stack.imgur.com/eXwQa.jpg)](https://i.stack.imgur.com/eXwQa.jpg)

The computer (Windows 7) handles the lights with a sequencer from Light-o-rama. 

**Now my question is:**  

How can I stream audio from the PC to the smartphones?  

I can figure out the smartphone end myself, but the streaming audio from PC is the thing here.

The solution can be anything! But I can't seem to figure it out!
Relevant languages I can do are:

1. C++
2. C#
3. Java
4. NodeJS
5. ASP.NET

But it can also be a program that already can do this!

EDIT:  

**THIS IS A MUST: Lights and music have to stay in sync! The lights dance to the music**

Anything helps! Thx in advance!

EDIT:  

I have awarded the in my eyes most fitting solution to this case the bounty, however, I haven't had the time to test all of the posted solutions. I will try to try every single one of them and then select that answer as the solution! Please see my comment underneath the answer which has the bounty! Thx all for the help!

Answer: 
It seems that the dev has already been done, there is an app "Speakerfy" that looks promising.
It is available on most of the mobile platforms and seems to do exactly what you need.
There is an article on this app at the following link that should give even more info.
<http://techland.time.com/2013/04/01/speakerfy-a-free-app-for-whole-home-audio-or-silent-discos/>
I hope this helps.
thinking about any device , i wold try get a Raspberry Pi (U$35) , install a Apache and Tomcat , Create a Web Application to play your musics , get a nice and easy domain or get a free domain and that's it .
You will not need any one use your wifi (unless you want).
if you get Hacked its just a U$35 Raspberry Pi , make sure to have a backup of you stuffs .
Any device with web browser will do it .