So, basically, I used the BWGen program (http://www.bwgen.com) it starts you off at 8hz (so as not to hurt your ears) and then over 10 minutes takes you down slowly to 4hz… then keeps you there for 40 minutes. Afterwards it takes you back up to 8hz over another 10 minutes. 🙂
I had one that started at 15hz, but it was much too ear piercing. LoL
I use this one quite often with good results. I find that the sensation of my consciousness goes down, down, down as the tone lowers.
Lemme know if it downloads and works okay.