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  2. Pitch shifting - Wikipedia

    en.wikipedia.org/wiki/Pitch_shifting

    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 two octaves, while more ...

  3. Audio time stretching and pitch scaling - Wikipedia

    en.wikipedia.org/wiki/Audio_time_stretching_and...

    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 control is a simpler process which ...

  4. Effects unit - Wikipedia

    en.wikipedia.org/wiki/Effects_unit

    Some hamonizers are able to create chorus-like effects by adding very tiny shifts in pitch. [98] The first mass-market digital pitch shifter was the DigiTech Whammy, introduced in 1989. [99] It creates a "strange and artificial" sound, with distinctive "wobbly" artifacts.

  5. DigiTech Whammy - Wikipedia

    en.wikipedia.org/wiki/DigiTech_Whammy

    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 ...

  6. Doppler effect - Wikipedia

    en.wikipedia.org/wiki/Doppler_effect

    The Doppler effect (also Doppler shift) is the change in the frequency of a wave in relation to an observer who is moving relative to the source of the wave. [1][2][3] The Doppler effect is named after the physicist Christian Doppler, who described the phenomenon in 1842. A common example of Doppler shift is the change of pitch heard when a ...

  7. Shepard tone - Wikipedia

    en.wikipedia.org/wiki/Shepard_tone

    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.

  8. Chorus (audio effect) - Wikipedia

    en.wikipedia.org/wiki/Chorus_(audio_effect)

    Chorus (or chorusing, choruser or chorused effect) is an audio effect that occurs when individual sounds with approximately the same time, and very similar pitches, converge. While similar sounds coming from multiple sources can occur naturally, as in the case of a choir or string orchestra , it can also be simulated using an electronic effects ...

  9. Delay (audio effect) - Wikipedia

    en.wikipedia.org/wiki/Delay_(audio_effect)

    Sound example of a plugin simulation of an analog delay (EHX Memory Man) with modulation and pitch shift on Amplitube 4. Steve Harris' Delayorama software. A natural development from digital delay-processing hardware was the appearance of software-based delay systems. In large part, this coincided with the popularity of audio editing software.

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