Editing Pitch control (section)

== DJing ==
[[File:Volxvergnuegen Party Munich 6.jpg|thumb|Pitch adjustment and beatmatching on a Technics SL-1210MK2 turntable]]
Pitch control is fundamental for [[DJing]]. By changing pitch, a DJ can alter the speed of an upcoming track to match its [[tempo]] to that of the currently playing track so that the [[Beat (music)|beats]] are synchronized, a technique called [[beatmatching]]. Through beatmatching, a DJ can create smooth transitions between tracks in a [[DJ set]].

Turntables, [[CDJs]], [[DJ controllers]], and DJ software allow DJs to change the speed at which a track is played for this purpose. [[Technics SL-1200]] turntables allow pitch changes to +/− 8% or 16%, depending on the model, and modern DJ gear often allows a range of +/- 100% (from pausing the track to playing the track twice as fast).

Modern DJ equipment also features [[Audio time stretching and pitch scaling|time stretching]], which allows the speed of a track to be changed without affecting its pitch, a feature often called "Master Tempo" or "Key Lock". Some equipment also features [[pitch shifting]], allowing pitch to be adjusted independently of tempo; this allows changing the [[musical key]] of tracks so that transitions between them sound more pleasing to the listener, a practice called [[harmonic mixing]].