Make Tech Easier published a tutorial showing you how to enable audio casting in Linux.
How to Enable Audio Casting in Linux
Audio casting – or audio streaming – allows audio played on one device to be played on another. It can be either live audio, files or even microphone input. Many of the tech giants have their own version of audio casting. Apple has AirPlay, and Google has Chromecast. For Linux, you are blessed with many different methods of audio casting by virtue of it being open source.
How to Enable Audio Casting in Linux