I do not really know the theory about all that I just speak from my personal experience. I did use binaural beats often over the past weeks. When I did use those I often listened to them in my bed and most of the times the duration was between 90 and 180 Minutes.
I think in terms of binaural beats the frequency is not the only thing that matters. I listened to different music with the same frequency and with some I resonate and with others I do not resonate. I also noticed that the intensity of the binaural beats differs. Some are more focused in the music and others are more focused on the binaural beat.
For me 0.1 Hz Delta wave brought me in some sort of psychedelic mind space it is hard to describe it is not the exact same thing but it goes pretty strong in this direction. The effect gets stronger the longer you listen to it and it last even for a couple hours after it depending on how long you listened. Your thoughts really drift completely away.
I had a really intense experience with this one.
 
I listened t it for 2h but after that it got too intense and I unplugged my earplugs and I wanted to stand up. I just thought I might just wait a bit. I completely lost than any sense of time and stood up 4h later. In the meantime I did not sleep but I was rather in a state between dream and reality it was very unique. The more often I listen to it the stronger the effect so far.
 
I also really like 396 Hz binaural beats. With those I rather have the psychedelic body space. I can feel my emotions way better than usually like on psychedelics (of course not that extreme). It really helps me to release emotions (lots of crying) and you can locate your emotions better in your body.
I really had some great experience with this one:
 
I would like to also hear experiences of other users. But this topic could be the same as with psychedelics that different people experience different things.