Scientific pitch notation creates a linear pitch space in which an octave spans 12 semitones, where each semitone is the distance between adjacent keys of the piano keyboard. Distance in this space corresponds to musical pitch distance in an equal-tempered scale; 2 semitones being a whole step, 1 semitone being a half step. An equal-tempered semitone can also be subdivided further into 100 cents. Each cent is semitone or octave. This measure of pitch allows the expression of "microtones" not found on standard piano keyboards. The notation is sometimes used in the context of meantone temperament, and does not always assume equal temperament
GNU Octave the default interface (over the command line interface) with the release of Octave 4.0. It was well-received by EDN contributor, who said "[Octave] now has a very workable GUI." Several 3rd-party graphical front-ends have also been developed, like ToolboX for coding education. With Octave code, the user can create GUI applications . Here are some examples. Button, edit control, checkboxTextboxListbox with message boxes.Radiobuttons An advanced example of Octave GUI application composition can be seen in the FEATool Multiphysics FEM simulation toolbox. Octave also has packages available for free. Those packages are located at Octave-Forge . Available packages are: GNU Octave