Augmented seventh Augmented seventh In classical music from Western culture, an augmented seventh is an interval produced by widening a major seventh by a chromatic semitone. For instance, the interval from C to B is a major seventh, eleven semitones wide, and both the intervals from C to B, and from C to B are augmented sevenths, spanning twelve semitones. Being augmented, it is classified as a dissonant interval. However, it is enharmonically equivalent to the perfect octave. Since an octave can be described as a major seventh augmented by a diatonic semitone, the augmented seventh is the sum of an octave,
GNU Octave Octave, some of them are accessible through packages via Octave-forge, but not all MATLAB functions are available in GNU Octave. List of unavailable functions exists in Octave, and developers are seeking for help to implement them. Looking for function __unimplemented.m__, leads to the list of unimplemented functions. Unimplemented functions are also categorized in Image, Mapping, Optimization, Signal, and Statistics packages. When an unimplemented function is called the following error message is shown: Octave comes with an official graphical user interface (GUI) and a integrated development environment (IDE) based on Qt. It has been available since Octave 3.8, and has become