Hello Alvyn Could you explain your method of analysis ? Reference: http://en.wikipedia.org/wiki/Note Many thanks Victor http://herrero-radio-astronomy.blogspot.com/ On Sun, Sep 11, 2011 at 10:17 AM, ALVYN NACMAN <alvynnacman@xxxxxxx> wrote: > Harmonics produced: C, E, G, C, E. No fundamental tone. >