Pitch shifter

From Free net encyclopedia

For the band, see Pitchshifter (band).

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.

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.

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

See also

• Timestretching
• Audio timescale-pitch modification

• Wavelet series
• Chirplet transform
• Fractional Fourier transform
• Short-time Fourier transform

External links

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

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