One of my biggest takeaways from the first Khemset retreat was becoming more mindful of heart rate and physiological state. Thank you, @Andrew Lichtenberger for once again drilling that point home. But when it comes to hemispheric synchronization, I've been playing with another theory for years, particularly regarding the music people listen to through headphones or earbuds while playing poker, creating art, writing, or doing anything else that benefits from entering a flow state. There has been scientific research into something called binaural beats. The basic concept is fascinating: A slightly different frequency is presented independently to each ear through stereo headphones. The auditory system perceives the difference between those frequencies as a third rhythmic beat. Researchers have studied whether this type of auditory stimulation can influence neural activity, attention, relaxation, cognition and synchronization between different areas of the brain. Which led me to an interesting question. What if some people's favorite or "lucky" music is helping them regulate their brain and body in ways they don't consciously recognize? Is it possible that ordinary songs were either accidentally or purposely embedded with secret binaural beats? There is no doubt in my mind that a particular combination of stereo separation, frequency, rhythm, tempo, repetition, emotional association and familiarity found in someone's favorite playlist can create an auditory environment that is unusually effective for that individual. There is a well-documented and observed reaction in autistic individuals as well as anxiety patients from playlists. Could that partially explain why some poker players continuously return to exactly the same playlist when they play well? And then let's take this one step further. Alex Foxen reportedly listens to Disney songs while playing poker. At first glance, that's amusing. But maybe there's something deeper happening.