On 19 August 2014 00:32, Nicola Perotto wrote: > Because the eighth note have a frequency double of the first. > http://en.wikipedia.org/wiki/Octave > > But then four times the freqeincy is the fifteenth note after the the first and that interval should be called the quindecimave. So the nomenclature in not enharmormonic. The problem is that musicians, being illogical creatures, call the tonic the first note of the scale whereas a logical engineer would call it the zeroth note. Then a doubling of frequency would be a septade and a quadrupling a .quattuordecimade and I would never have started this thread. --=20 __________________________________________ David C Brown 43 Bings Road Whaley Bridge High Peak Phone: 01663 733236 Derbyshire eMail: dcb.home@gmail.com SK23 7ND web: www.bings-knowle.co.uk/dcb --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .