I have tried a lot of binaural beats before I have not actually spent enough time with any of them to see if they work. The ones for concentration seem to help. I got a pair of noise isolating ear buds with a high range to make them more effective and have about 20 gigs worth of hemi sync audio on my hard drive. I would say check out some that is commercially available and not just the free stuff on YouTube as the commercial stuff is probably a higher quality.
