Capture your system audio and stream everything directly to your Chromecast.
Stream your PC's audio to the Chromecast
OSX Users!
Use this for OSX support: https://github.com/andresgottlieb/soundcast
Download release file: https://github.com/acidhax/chromecast-audio-stream/releases/download/0.2.5/audio-cast-1.0.0-win32-ia32.zip
Extract and execute audio-cast.exe.
Right click tray icon and select your cast device.
Enjoy!