Thanks for responding to me. I will look it up more now. Not to downplay the importance, but as I read what you said about different frequencies healing different things I was thinking I need an entire orchestra of Hz frequencies to work on me daily... now that I think about it, wouldn't that be terrific if we could go in for a tune up - that actually is a 'tune up.' I'm so punny tonight. Thanks for this-will check it out.