https://www.cnet.com/news/imec-eeg-headset-music-brain-waves/

If you've seen electroencephalogram (EEG) technology, it probably had something to do with scientists researching brain waves by wiring a bunch of electrodes to somebody's skull. Now European researchers have an easier approach they think will break the technology out of the lab.

At the CES 2018 tech show, a Belgian technology center called Imec is showing off a much simpler EEG headset that'll gauge your emotions. It can help with therapy but also tackle other things, like changing your video game as you play, improving memory when you're learning, matching music to your mood or even adjusting your mood by changing your music.