Yes, some, many years ago. Pretty sure at one point during my homeless phase I even fell asleep while listening to binaural beats. It was just an app and I had absolutely no idea what I was doing though. It was just an interesting experience I suppose and I was playing. I'm not familiar with the sbagen tool. Is that a piece of software for binaural beats? I don't know that I could offer any sort of teleological legend on various binaural beat types but I like the idea of developing such a thing.