> > Frequencies are the same that Ian and Bernie used (if you have the EN > > article. If you don't, I can look the up.) > > I would have check them if I had them and then only asked if you used the same. > > I have still not got the ENs you know (and you know why I guess). Maybe one > day. Lowest is 43.5 Hz. Next is 50.4 Hz. f(N+1) = k * f(N) JH.