An octave represents eight notes, not a factor of eight.=20 Makes more sense than "flammable" and "inflammable" :) Bob On Mon, Aug 18, 2014, at 11:31 AM, David C Brown wrote: > A decade is a factor of ten so an octave must be a factor of eight > mustn't > it? Well, no it is actually a factor of two. Why? Very illogical. > I know it is borrowed from musical theory where an octave is an interval > of > seven notes. Equally illogical --=20 http://www.fastmail.fm - Same, same, but different... --=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 .