Backmasking is a recording technique in which a spoken or sung message is recorded backwards onto a track that is meant to be played forwards. The hidden message becomes intelligible only when the track is reversed. The Beatles pioneered the technique on “Rain” in 1966, and it later fueled the 1980s “hidden Satanic messages” panic in the United States.
What is backmasking?
Backmasking — often written “backward masking” in 1980s press coverage — is the deliberate embedding of reversed audio in a recording so that its meaning is hidden during normal playback. Played forwards, a backmasked passage sounds like a garbled swell of syllables. Played in reverse, it snaps into clear speech or singing.
Two very different things get called backmasking, and the distinction matters. The first is deliberate backmasking: an artist records a message, reverses it in the studio, and mixes it into the finished track. ELO’s spoken warning on “Fire on High” and Prince’s hidden gospel line on “Darling Nikki” are engineered this way — reverse the tape and the words are unmistakable.
The second is alleged backmasking: phrases listeners believe they hear when an ordinary forward vocal happens to be reversed. No message was recorded; the brain imposes words on ambiguous sound, a perceptual effect called pareidolia. The most famous accusations — Led Zeppelin’s “Stairway to Heaven,” Queen’s “Another One Bites the Dust” — fall in this category.
Both kinds shaped the technique’s strange history: one as a studio art form, the other as the fuel for a decade of sermons, hearings, and record burnings. The irony is that the accusations advertised the technique better than any producer could. After 1982, deliberate backmasking spiked — bands started hiding messages precisely because audiences were now reversing their records looking for them.
How does backmasking work technically?
Deliberate backmasking is a three-step studio process. First, the performer records the message normally, speaking or singing forwards. Second, the engineer reverses that recording — in the tape era by physically flipping the reel or threading the tape backwards past the playback head; today with a one-click reverse function in any audio editor. Third, the reversed clip is mixed into the master at the chosen spot. The finished song plays forwards; the buried clip plays backwards inside it. Anyone who reverses the whole song hears the surrounding music turn to mush while the hidden message plays forwards, perfectly intelligible.
There is a second, much harder method: phonetic reversal. Instead of reversing tape, the performer learns to pronounce the reversed sounds of a phrase and performs them live. Reverse that performance and you get intelligible speech with an uncanny, gliding cadence. David Lynch used exactly this for the Red Room scenes in Twin Peaks: actors memorized their lines phonetically backwards, the film was reversed, and the dialogue came out forwards with an otherworldly slur. Phonetic reversal is rare in music because reversed phonemes are genuinely difficult to articulate — most vocalists cannot produce a clean reversed “s” or a backwards plosive.
The tape method hides a perfect message; the phonetic method hides an imperfect one in plain sight. Both depend on the same fact: reversal is a lossless operation, so whatever was recorded survives the flip intact.
Who invented backmasking?
The Beatles, in April 1966, during the sessions that produced Revolver. The first released example is “Rain,” the B-side of “Paperback Writer”: its coda repeats a line of John Lennon’s first-verse vocal backwards over the fadeout.
The origin story has two competing tellings, both from the people in the room. Lennon said he took a rough mix home, threaded the tape into his machine the wrong way round, and was so struck by the backwards vocal that he brought it to the studio the next day insisting it go on the record. Producer George Martin later said he had reversed the vocal himself as a demonstration and played it for the band. Either way, the effect was deliberate by the time “Rain” was mixed, and the same sessions produced the reversed guitar parts on “Tomorrow Never Knows.”
The Beatles did not invent reversed audio itself. Musique concrète composers — Pierre Schaeffer’s Paris studio from the late 1940s onward — had been flipping tape for decades, and avant-garde works used reversal freely as texture. What “Rain” established was different: a reversed message hidden inside a mainstream pop record, placed there for listeners to discover. That is the specific practice the word backmasking describes, and every example that followed traces back to it. Within a decade the trick had become a genre convention — a private channel between artist and the kind of fan willing to spin a record backwards.
What are the most famous backmasking examples?
The title promises ten, so here are ten — six engineered on purpose, four that exist only in the listener’s head. The deliberate-or-alleged column is the one that matters: it separates studio craft from pareidolia.
| Song | Artist | Year | Heard when reversed | Deliberate or alleged? |
|---|---|---|---|---|
| ”Rain” | The Beatles | 1966 | First-verse vocal repeated backwards in the coda | Deliberate |
| ”Revolution 9” | The Beatles | 1968 | ”Turn me on, dead man” (from the “number nine” loop) | Alleged — pareidolia |
| ”Stairway to Heaven” | Led Zeppelin | 1971 | ”My sweet Satan” and similar phrases | Alleged — pareidolia |
| ”Fire on High” | Electric Light Orchestra | 1975 | Spoken warning: “The music is reversible, but time is not. Turn back!” | Deliberate |
| ”Empty Spaces” | Pink Floyd | 1979 | A congratulations note to whoever finds the hidden message | Deliberate |
| ”Another One Bites the Dust” | Queen | 1980 | ”It’s fun to smoke marijuana” | Alleged — pareidolia |
| ”Snowblind” | Styx | 1981 | ”Satan move through our voices” | Alleged — pareidolia |
| ”Still Life” | Iron Maiden | 1983 | A growled joke message mocking backmasking accusers | Deliberate |
| ”Darling Nikki” | Prince | 1984 | A gospel message: “the Lord is coming soon” | Deliberate |
| ”Nature Trail to Hell" | "Weird Al” Yankovic | 1984 | ”Satan eats Cheez Whiz” | Deliberate |
The deliberate entries show the technique’s range: ELO hid a formal spoken address, Pink Floyd hid a prank that congratulates the listener and invites them to write in, Prince hid a sincere religious message inside his most explicit song, and Iron Maiden and Weird Al hid open mockery of the people accusing them. The alleged entries share one trait — every band denied them, and none survives a blind listen. For a track-by-track breakdown of what each reversal actually sounds like, see the guide to hidden reversed messages in songs.
What is the difference between backmasking, reversed audio, and phonetic reversal?
The three terms nest inside each other, and conflating them is where most confusion about backmasking starts.
Reversed audio is the umbrella: any sound played back-to-front. A reversed cymbal swell, a reverse-reverb vocal tail, an entire song flipped for effect — all reversed audio, no hidden message required. Most reversal in music is this: pure texture.
Backmasking is a subset: reversed audio used to conceal a message inside a forward-playing track. The defining test is intent plus intelligibility — someone recorded words, flipped them, and buried them, and reversing the track recovers those words exactly.
Phonetic reversal is a performance technique rather than a tape trick: a person articulates the reversed sounds of a phrase, so the recording is “forward” but its meaning lives in reverse. It produces speech with smeared attacks and alien vowel glides even after decoding.
Knowing which one you are hearing tells you what reversal will reveal: a message (backmasking), eerie but meaningful speech (phonetic reversal), or evocative gibberish (everything else). That gibberish has its own strange character — swelling syllables, clipped endings, a liquid slur — explained in detail in why reversed audio sounds weird.
Why did backmasking cause a moral panic in the 1980s?
In January 1982, a Trinity Broadcasting Network program claimed that rock records carried Satanic messages audible when played backwards, citing “Stairway to Heaven” as the prime exhibit. The claim spread through evangelical radio, seminars, and record burnings, and within months it reached lawmakers.
That April, California assemblyman Phil Wyman introduced a bill to require warning labels on records containing backmasked messages, and a state Assembly committee hearing played “Stairway to Heaven” in reverse into the record. In 1983, the Arkansas legislature passed a similar labeling bill that named specific artists — including The Beatles, Pink Floyd, ELO, Queen, and Styx — before Governor Bill Clinton returned it unsigned and the measure died. The 1985 Senate hearings driven by the Parents Music Resource Center focused mainly on explicit lyrics, but they drew on the same anxiety backmasking had ignited: that records were doing something to listeners beneath conscious awareness.
The science never cooperated. In 1985, psychologists John Vokey and Don Read tested reversed speech on listeners and found they could not extract meaning from it, could not reliably classify its content, and showed no behavioral influence — they heard “messages” only after being told what to listen for. That priming effect explains the whole phenomenon: the televangelists supplied the words first, then played the sound. A 1990 civil trial against Judas Priest over alleged subliminal messages ended in the band’s favor. By the early 1990s the panic had collapsed, leaving behind no law and a catalog of records that sold better for the accusation.
How can you hear backmasking yourself?
Reversing a track takes about a minute and requires no equipment beyond a phone or a browser.
The fastest route is a free audio reverser that runs in the browser: drop in an MP3 or WAV, press reverse, and compare the original against the flipped version. Processing happens on your device — nothing is uploaded. To hunt through a track on a phone, with slowdown and pitch control for picking apart a specific passage, the Reverse Audio PRO app does the same job; there are short guides for reversing audio on iPhone and reversing audio on Android.
Two experiments worth running. First, a known deliberate example: take the opening seconds of ELO’s “Fire on High” and reverse them — the spoken message is immediate and unambiguous, a clean reference point for what real backmasking sounds like. Second, the pareidolia test: reverse any ordinary vocal without reading what you are supposed to hear, write down what you think it says, then compare notes with someone who was primed with the alleged phrase. The gap between your two answers is the entire 1980s controversy in miniature.
Recording your own voice, reversing it, and reversing it back also demonstrates the core property that makes backmasking possible: the flip loses nothing. The message was always there — it just needed the tape turned around.