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  2. Octave - Wikipedia

    en.wikipedia.org/wiki/Octave

    In music, an octave (Latin: octavus: eighth) or perfect octave (sometimes called the diapason) [2] is an interval between two notes, one having twice the frequency of vibration of the other. The octave relationship is a natural phenomenon that has been referred to as the "basic miracle of music", the use of which is "common in most musical ...

  3. Rule of the octave - Wikipedia

    en.wikipedia.org/wiki/Rule_of_the_octave

    The rule of the octave is a way of harmonizing each note of the diatonic scale, reflecting common practice, and has its origin in the practice of thorough bass, or basso continuo, where it provided an easy way to find which chord could accompany each note of the scale in the bass, particularly in the absence of figuring.

  4. GNU Octave - Wikipedia

    en.wikipedia.org/wiki/GNU_Octave

    GNU Octave is a scientific programming language for scientific computing and numerical computation.Octave helps in solving linear and nonlinear problems numerically, and for performing other numerical experiments using a language that is mostly compatible with MATLAB.

  5. Octave (electronics) - Wikipedia

    en.wikipedia.org/wiki/Octave_(electronics)

    In electronics, an octave (symbol: oct) is a logarithmic unit for ratios between frequencies, with one octave corresponding to a doubling of frequency. For example, the frequency one octave above 40 Hz is 80 Hz. The term is derived from the Western musical scale where an octave is a doubling in frequency.

  6. List of numerical libraries - Wikipedia

    en.wikipedia.org/wiki/List_of_numerical_libraries

    GNU Octave is an open source high level programming language and library, including a command line interface and GUI, analogous to commercial alternatives such as Maple, MATLAB, Mathematica, etc. APIs, functions and libraries can be called from many platforms, including high level engineering programs, where functions are, in many cases ...

  7. Scientific pitch notation - Wikipedia

    en.wikipedia.org/wiki/Scientific_pitch_notation

    Thus, A 0 refers to the first A above C 0 and middle C (the one-line octave's C or simply c′) is denoted as C 4 in SPN. For example, C 4 is one note above B 3, and A 5 is one note above G 5. The octave number is tied to the alphabetic character used to describe the pitch, with the division between note letters ‘B’ and ‘C’, thus:

  8. Set theory (music) - Wikipedia

    en.wikipedia.org/wiki/Set_theory_(music)

    The number of distinct sets in a type is 24 (the total number of operations, transposition and inversion, for n = 0 through 11) divided by the degree of symmetry of T n /T n I type. Transpositionally symmetrical sets either divide the octave evenly, or can be written as the union of equally sized sets that themselves divide the octave evenly.

  9. Register key - Wikipedia

    en.wikipedia.org/wiki/Register_key

    Pressing the octave key opens the top tone hole in the neck of the saxophone. Alternatively, whenever the G key is fingered, the top tone hole closes and a small tone hole is opened near the top of the body. Some baritone saxophones, notably those made by Yamaha, also have three octave tone holes. The third one is used to prevent a rough ...