Editing Low-frequency effects (section)

{{Short description|Band-limited audio for 3–120 Hz range}}
{{Other uses|LFE (disambiguation)}}

The '''low-frequency effects''' ('''LFE''') channel is a band-limited [[Audio signal|audio track]] that is used for reproducing deep and intense low-frequency sounds in the 3–120 [[Hertz|Hz]] frequency range.<ref name=DolbyLFE> {{cite web
| url         = https://www.dolby.com/uploadedFiles/Assets/US/Doc/Professional/38_LFE.pdf
| title       = What is the LFE channel? <!-- Dolby reference number = S00/12888/13409 -->
| year        = 2000
| publisher   = Dolby Laboratories, Inc.
| format      = PDF
| access-date = 2021-04-11
}}</ref><ref name=DolbySurroundSound> {{ cite web
| url         = http://www.associationdesmixeurs.fr/wp-content/uploads/2015/10/Dolby-5.1-Channel-Production-Guidelines.pdf
| title       = 5.1-Channel Production Guidelines <!-- Dolby reference number =  S00/12957 -->
| year        = 2000
| publisher   = Dolby Laboratories, Inc.
| format      = PDF
| access-date = 2021-04-11
}}</ref><ref name="DolbyMusicProd"> {{cite web 
|url = http://educypedia.karadimov.info/library/4_Multichannel_Music_Mixing.pdf 
|title = 5.1-Channel Music Production Guidelines <!-- Dolby reference number = Issue 3; S05/14926/15996 --> 
|year = 2005 
|publisher = Dolby Laboratories, Inc 
|format = PDF 
|access-date  = 2021-04-11 }} </ref><ref name=BBCLFE> {{ cite web
| url         = http://downloads.bbc.co.uk/rd/pubs/whp/whp-pdf-files/WHP203.pdf
| title       = Use of the low frequency effects (LFE) channel in broadcasting
| year        = August 2011
| first       = Andrew
| last        = Mason
| publisher   = BBC Research and Development White Paper WHP 203
| format      = PDF
| access-date = 2021-04-11
}}</ref>

This track is normally sent to a [[subwoofer]]—a loudspeaker designed to reproduce very low frequencies. LFE channels originated in [[Dolby Stereo]] 70&nbsp;mm film,<ref name=DolbyLFE> </ref> but in the 1990s and 2000s they became common in [[home theater system]]s in order to reproduce film soundtracks found on [[DVD]]s and [[Blu-ray Disc|Blu-ray discs]].