In California, are there any specific licensing requirements to start Brainwave Entrainment Company?

I am a part/time (certified) hypnotherapist. I make extensive use of brainwave technology software to design pleasant and effective audio sessions for friends and family members. The programs I use are easily available on the web and any one can download and use it. Since I have hypnotherapist education, I strongly feel I can make a good use of technology tools and positively impact the life of others. However, at the same time I want to make sure my good intentions don't backfire me in anyway. I had no problem in obtaining city and county business license, but I am unable to find any resource in California, that stops me from doing what I wish to do. I am not planning to be a psychiatrist/psychologist or behavior counselor etc. It is more about stimulating brain to get positive results.