Editing Low-frequency oscillation (section)

{{Short description|Means of modulation in music production}}
{{Refimprove|date=December 2009}}

[[File:LFOsection.png|300px|thumb|right|LFO section of an [[Access Virus]] C series synthesizer]]

'''Low-frequency oscillation''' ('''LFO''') is an electronic [[frequency]] that is usually below 20&nbsp;[[Hertz|Hz]] and creates a rhythmic pulse or sweep. This is used to modulate musical equipment such as [[synthesizer]]s to create [[audio signal processing|audio effects]] such as [[vibrato]], [[tremolo]] and [[phaser (effect)|phasing]].<ref name="oregon">{{cite web|url=http://pages.uoregon.edu/emi/31.php |last1= Stolet |first1= Jeffrey |series= Electronic Music Interactive, 2nd edition |title=31. Low-frequency Oscillators |date=2009 |publisher=University of Oregon |access-date=13 Jul 2013}}</ref>