Octave StretchPeople generally feel that a note whose frequency is twice another notes frequency is somehow "the same note" only higher. If you have a piano handy, play the D note (between the pair of black notes) in each octave. The frequency of each D note is about twice that of the D note before it.
But many people feel that the octave is not exactly two times the lower note. To many people, two notes whose ratio is slightly different than 2.0 sound more alike.
Important: Please do NOT hit the Print Stretch button until the instructions tell you to!
©Burk/Polansky/Repetto/Roberts/Rockmore. All rights reserved.