One day, while I was at work and trying to get through my work day with the same feelings of helpless panic that can plague me, I started searching for subliminal tracks on YouTube. I was looking for something for depression/anxiety and found some tracks called “binaural beats.” Meant to be used with headphones, each ear has a different frequency but the brain perceives it as a pulsating sound. Half the time I had it on speakers, so it was already “pre-mixed.” I don’t know about the wild claims of being better than drugs and letting you levitate (okay I made that last one up), but I do find that it helps to calm me down and concentrate. My favorite one so far is: Chakra Healing Alpha Binaural Beats – Extended Version.
And if you check it out, my answer to your question is yes, I can actually listen to it for over an hour.