Audio Transmitter App

I need an app that would include all source code that would be installable on android & windows. The purpose of the app is to merely transmit or receive system audio from one device to another through bluetooth &/or wifi. The app is to be as simple as possible UI wise. The user could choose wifi or bluetooth at their will to transmit or receive audio from either the windows app or the android app. So long as both devices have it open. No ads or anything distracting or itritating, just as simple & clean as possible.