It has been suggested that this article or section be merged with pitch shift. (Discuss)

It has been suggested that this article or section be merged with pitch correction. (Discuss)

For the band, see Pitch Shifter.

A pitch shifter is an audio processor that changes the pitch of an audio signal. Originally marketed by Eventide as the Harmonizer effects processor, advances in digital signal processors soon made higher-quality pitch shifting and harmonic pitch shifting possible. Wikipedia does not have an article with this exact name. ... Pitch shift is a sound recording technique, in which the normal pitch or tone of a sound is altered (shifted), for effect or for other purposes. ... Wikipedia does not have an article with this exact name. ... Pitch correction is the process of correcting the intonation of an audio signal without affecting other aspects of its sound. ... This article is about compression waves. ... Pitch is the perceived fundamental frequency of a sound. ... A digital signal processor (DSP) is a specialized microprocessor designed specifically for digital signal processing, generally in real-time. ...

Since the mid-1990s, formant correction has been available to avoid the "chipmunk voice" effect that typically occurs when shifting vocal pitch upwards. Pitch shifters are included in most multi-effect generators today. Spectrogram of American English vowels [i, u, É‘] showing the formants f1 and f2 A formant is a peak in an acoustic frequency spectrum which results from the resonant frequencies of any acoustical system. ... This article or section is not written in the formal tone expected of an encyclopedia article. ...

During the late 1990s and early 2000s, pitch shifting has had enormous influence on recorded music. Among several others, specialized DSP (Digital Signal Processing) software such as Antares' "Auto-Tune", Celemony's "Melodyne" and Prosoniq's "TimeFactory" has given producers of contemporary music the ability to ensure their recordings have no unwanted intonation inaccuracies.

See also

• Timestretching
• Audio timescale-pitch modification

• Short-time Fourier transform
• Digitech Whammy

Timestretching, time stretching, timescaling or pitch control is the process of changing the speed or duration of an audio signal without affecting its pitch. ... Time stretching is the process of changing the speed or duration of an audio signal without affecting its pitch. ... The short-time Fourier transform (STFT), or short-term Fourier transform, is a Fourier-related transform used to determine the sinusoidal frequency and phase content of a signal as it changes over time. ... The Digitech Whammy is a pitch-shifter effects pedal manufactured by Digitech. ...

External links

• Time Stretching And Pitch Shifting of Audio Signals by Stephan M. Bernsee