B flat.

The 'existence' of gods - Beliefnet:

"My answer to lack of faith is to enjoy the symphony of life without the vuvuzela in the fancy dress in the overdecorated balcony droning loudly in B flat. I don't need to E-X-P-E-R-I-E-N-C-E B flat. I hear it wherever there are mindless idiots doing whatever mindless idiots do. There are all too many of them, but fortunately B flat is easy to ignore while you are getting to interesting places where it isn't the only note on the program."