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pitch correction
Pitch correction is the process of correcting the intonation of an audio signal 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 correctors is in Western popular music on vocal lines.
==History==
Pitch correction was relatively uncommon before 1997, when Antares Audio Technology's Auto-Tune Pitch Correcting Plug-In was introduced. This replaced slow studio techniques with a real-time process that could also be used in live performance.〔Anderton, Craig. "In Search of the Perfect Pitch; The fix is in". EQ. 2006-07-01. Pg. 46.〕
Auto-Tune is still widely used, as are other pitch-correction algorithms including Celemony's Direct Note Access which allows adjustment of individual notes in a polyphonic audio signal,〔Hodgson, Jay (2010). ''Understanding Records'', p.233. ISBN 978-1-4411-5607-5.〕 and Celemony's Melodyne. Pitch correction is now a common feature in digital audio editing software, having first appeared as a Pro Tools plugin and now being found in products such as Apple GarageBand, Apple Logic Pro, Adobe Audition, FL Studio & Steinberg Cubase. MorphTune also provides this functionality. It is also available in the form of rackmount hardware, such as the TC-Helicon VoiceOne. A free VST plugin known as GSnap can also be used to get the same effect. In the Linux FOSS community, Autotalent and Zita-AT1 offer this functionality.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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