Chromecast is a wonderful and cheap device that you can hook up to any device that either has an HDMI, analog or digital audio port to spare. Doing so will enable to stream just about anything that is on the internet to said device. Sounds wonderful! There is however a little pitfall. If you wanted to stream your own music from a local source or just route the audio from your PC/laptop to your Chromecast you would find it impossible to do so out of the box. That is until now.
The nVidia drivers offer a hidden feature that forces output to ports, even if no monitor on that port can be detected. This can be very useful if your monitor/TV or input or cable is defective. Or if your monitor accepts both a digital or analog signal trough the DVI cable but you want to force a digital signal.
If you happen to own multiple Chromecast audio devices you might be pleased to learn that Google added a new feature last December to cast audio to all your Chromecast Audio devices at once. There is however a very annoying bug that causes the music to only play on one device. The official workaround requires you to manually reset the device that is playing music. I’ve found a better solution.