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Audio time stretching and pitch scaling. Time stretching is the process of changing the speed or duration of an audio signal without affecting its pitch. Pitch scaling is the opposite: the process of changing the pitch without affecting the speed. Pitch shift is pitch scaling implemented in an effects unit and intended for live performance.
Pitch shifter and harmonizer. A pitch shifter is a sound effects unit that raises or lowers the pitch of an audio signal by a preset interval. For example, a pitch shifter set to increase the pitch by a fourth will raise each note three diatonic intervals above the notes actually played. Simple pitch shifters raise or lower the pitch by one or ...
Shepard tone. A spectrogram of ascending Shepard tones on a linear frequency scale. A Shepard tone, named after Roger Shepard, is a sound consisting of a superposition of sine waves separated by octaves. When played with the bass pitch of the tone moving upward or downward, it is referred to as the Shepard scale.
The DigiTech Whammy is a pitch shifter pedal manufactured by DigiTech. It raises or lowers the pitch of an audio signal by up to two octaves, controlled with a treadle. The first model, released in 1989, was the first mass-market digital pitch shifter. The Whammy has a distinctive artificial sound, and Guitar World described it as one of the ...
The shifting of a melody, a harmonic progression or an entire musical piece to another key, while maintaining the same tone structure, i.e. the same succession of whole tones and semitones and remaining melodic intervals. For example, a music transposer might transpose an entire piece of music into another key.
Pitch is a perceptual property that allows sounds to be ordered on a frequency -related scale, [1] or more commonly, pitch is the quality that makes it possible to judge sounds as "higher" and "lower" in the sense associated with musical melodies. [2] Pitch is a major auditory attribute of musical tones, along with duration, loudness, and timbre.
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