Pitch

In music, chordal space is a mathematical model of relationships between chords in some musical system. These models are often graphs, or tilings. Closely related to chordal space is modulatory space, which represents pitch classes; the chords of a chordal space are chosen from the pitch classes of a modulatory space. ...more on Wikipedia about "Chordal space"

In music, pitch is the perception of the frequency of a note. ...more on Wikipedia about "Pitch (music)"

In music pitch space is the modeling of pitch relationships, represented through mathematical models, most often multidimensional, describing how near or far pitches are from each other. These models are often graphs, groups, lattices, or geometrical figures such as helixes. Pitch space strictly speaking includes octaves, and when relationships between pitch classes are represented instead, we have modulatory space, ...more on Wikipedia about "Pitch space"

Pure tone is a single frequency tone with no harmonic content (no overtones). This corresponds to a sine wave. It is characterized by the frequency - the number of cycles per second, the wavelength - the distance the waveform travels through its medium within a period, and the amplitude - the size of the cycles. ...more on Wikipedia about "Pure tone"

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