You can cast your Brio web client (player) using Chromecast with the following steps:
1. Open your Brio web (client) audio using Google Chrome (browser)
2. Install the Google Cast Extension (download here)
3, With the extension installed, you can start by clicking "Google Cast" button in Chrome
4. Select the Chromecast you want from the drop-down menu
5. If you want to stop casting, simply click the Cast button again, and then click "Stop casting"
Next Article: "How To Connect To A FTP-Server in BRIO?"