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  2. Audio time stretching and pitch scaling - Wikipedia

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

    The simplest way to change the duration or pitch of an audio recording is to change the playback speed. For a digital audio recording, this can be accomplished through sample rate conversion. When using this method, the frequencies in the recording are always scaled at the same ratio as the speed, transposing its perceived pitch up or down in ...

  3. Pitch correction - Wikipedia

    en.wikipedia.org/wiki/Pitch_correction

    Pitch correction devices do this without affecting other aspects of its sound. Pitch correction first detects the pitch of an audio signal (using a live pitch detection algorithm), then calculates the desired change and modifies the audio signal accordingly. The widest use of pitch corrector devices is in Western popular music on vocal lines.

  4. Pitch shifting - Wikipedia

    en.wikipedia.org/wiki/Pitch_shifting

    Pitch shifters are included in most audio processors today. A harmonizer is a type of pitch shifter that combines the pitch-shifted signal with the original to create a two or more note harmony. The Eventide H910 Harmonizer, [2] released in 1975, was one of the first commercially available pitch-shifters and digital multi-effects units. On ...

  5. Auto-Tune - Wikipedia

    en.wikipedia.org/wiki/Auto-Tune

    Auto-Tune is audio processor software released on September 19, 1997, by the American company Antares Audio Technologies. [1] [4] It uses a proprietary device to measure and correct pitch in music. [5] It operates on different principles from the vocoder or talk box and produces different results. [6]

  6. Eltro information rate changer - Wikipedia

    en.wikipedia.org/wiki/Eltro_Information_Rate_Changer

    The Eltro information rate changer was an analog recording tool for changing pitch without changing speed and vice versa. Patents for the device date from the 1920s. [1] The Eltro was the first machine capable of changing audio pitch (frequency) and speed (time) independently of each other.

  7. Voice changer - Wikipedia

    en.wikipedia.org/wiki/Voice_changer

    The term voice changer (also known as voice enhancer) refers to a device which can change the tone or pitch of or add distortion to the user's voice, or a combination and vary greatly in price and sophistication. A kazoo or a didgeridoo can be used as a makeshift voice changer, though it can be difficult to understand what the person is trying ...

  8. Pitch control - Wikipedia

    en.wikipedia.org/wiki/Pitch_control

    Technics SL-1210MK2 turntable pitch control slider. A variable speed pitch control (or vari-speed) is a control on an audio device such as a turntable, tape recorder, or CD player that allows the operator to deviate from a standard speed (such as 33, 45 or even 78 rpm on a turntable), resulting in adjustments in pitch. [1]

  9. Envelope (music) - Wikipedia

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

    An envelope may relate to elements such as amplitude (volume), frequency (with the use of filters) or pitch. Envelope generators , which allow users to control the different stages of a sound, are common features of synthesizers , samplers , and other electronic musical instruments .

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