Low-frequency effects

The low-frequency effects (LFE) channel is a band-limited audio track that is used for reproducing deep and intense low-frequency sounds in the 3–120 Hz frequency range.^[1] ^[2] ^[3] ^[4]

This track is normally sent to a subwoofer—a loudspeaker designed to reproduce very low frequencies. LFE channels originated in Dolby Stereo 70 mm film,^[1] but in the 1990s and 2000s they became common in home theater systems in order to reproduce film soundtracks found on DVDs and Blu-ray discs.

^ ^a ^b "What is the LFE channel?" (PDF). Dolby Laboratories, Inc. 2000. Retrieved 2021-04-11.
^ "5.1-Channel Production Guidelines" (PDF). Dolby Laboratories, Inc. 2000. Retrieved 2021-04-11.
^ "5.1-Channel Music Production Guidelines" (PDF). Dolby Laboratories, Inc. 2005. Retrieved 2021-04-11.
^ Mason, Andrew (August 2011). "Use of the low frequency effects (LFE) channel in broadcasting" (PDF). BBC Research and Development White Paper WHP 203. Retrieved 2021-04-11.

[DolbyLFE-1] "What is the LFE channel?" (PDF). Dolby Laboratories, Inc. 2000. Retrieved 2021-04-11.

[DolbySurroundSound-2] "5.1-Channel Production Guidelines" (PDF). Dolby Laboratories, Inc. 2000. Retrieved 2021-04-11.

[DolbyMusicProd-3] "5.1-Channel Music Production Guidelines" (PDF). Dolby Laboratories, Inc. 2005. Retrieved 2021-04-11.

[BBCLFE-4] Mason, Andrew (August 2011). "Use of the low frequency effects (LFE) channel in broadcasting" (PDF). BBC Research and Development White Paper WHP 203. Retrieved 2021-04-11.

[1]

[2]

[3]

[4]