Ask HK: What are the benefits of listening to alpha waves?

Hi HN! It's my first post here so please let me know if this has already been discussed before.

I sometimes listen to alpha waves (via Spotify) while working as I find it helps me focus. I have a pretty short attention span so tend to stick to something if it helps. Similarly, things like Gregorian chants and other simple, ambient sounds garner the same effect.

My question is, are there any benefits to listening to alpha waves beyond aiding productivity?

Thanks!