I've used Binaurals and Isochronic tones on and off for about 23 years now with some good succcess. Just posting some interesting ones here. Eyes closed, headphones on. Always put up a golden energy shield around you when you work with your energy centers.
Have you personally tried each and every one of them?
I'm basically sticking with a simple isochronic alpha... and then move to a theta. No music, no chanting, (although, I am also usign the Silva Mind method audio, as I find it easier to focus on her voice than using my mind alone... obviously, I need to not do that, and I don't need to - but it's a soothing voice)
Yes. These ones I usually use and rotate as I feel the need. Right after using the epsilon one (deepest level even below delta) and I had a lucid dream after where I woke up in the dream and met the MILAB (military abduction idiots) and the Draco they were working with trying to use me for something to do something for them. I called them out to their faces.
The best way to focus the mind for meditation is to do void meditation in the beginning for a few months. That's basically where you try to empty the mind and not allow any thoughts or images to come into it or at least to have no hold in you to distract you. Most people just jump into meditation without strengthening their visualization ability and then drift between different useless thoughts/distractions rather than what their focus is for that meditation session. It works better and strengthens your Will at the same time.