. . . . . . . . . "Oct"@en . "http://dbpedia.org/resource/Octave"^^ . "oct" . "http://en.wikipedia.org/wiki/Octave_(electronics)"^^ . . "An octave is a doubling or halving of a frequency. One oct is the logarithmic frequency interval between \\(f1\\) and \\(f2\\) when \\(f2/f1 = 2\\)."^^ . . . . .