The Invention That Changed Music Forever: Ken Townsend’s Drive Home That Changed Everything

The Invention That Changed Music Forever: Ken Townsend’s Drive Home That Changed Everything

There is a technical term used everywhere in music production today that is named after something that was never invented. The term is flanging. The thing that was never invented is a bifilar flangerlizer. This is the story of how a made-up name became real terminology and how an invention that changed the sound of rock music forever came into existence because a producer wanted to make a joke and an engineer wanted to drive home.

On a spring night in 1966, Ken Townsend was driving back to his home in London after a particularly long day at Abbey Road Studios. He was not a famous producer. He was not a well-known engineer. He was the technical engineer at EMI’s recording studios, which meant he was responsible for the maintenance and development of equipment.

 He was, in the terminology of the era, one of the backroom boys, one of the men behind the scenes who made creative work possible without the artists having to think about it. Townsend had spent years at Abbey Road solving technical problems that nobody else thought to solve. The staff called him when a microphone needed adjustment. They called him when an amplifier was not working properly.

They called him when they needed something invented that did not exist yet. The problem Townsend was thinking about as he drove home that night was not new. He had heard it expressed many times over the past months. John Lennon, the most difficult and most demanding of the four Beatles, had been complaining about the process of double-tracking vocals.

The standard technique for creating a fuller, richer vocal sound was brutally simple and brutally tedious. The singer recorded their part once. Then they recorded it again, trying to replicate exactly the same timing, the same tone, the same energy. The two vocal tracks were mixed together.

 The result was that fuller, richer sound that the Beatles and practically all pop and rock artists use systematically. But the problem was obvious. It took time, a lot of time. The singer had to listen to the first track over and over, internalize it completely, and then sing on top of it with enough precision that the two versions were close enough to create the doubling effect, but not so identical that the result sounded like a simple echo.

It was a technical skill in addition to being a musical challenge, and it was exhausting. Lennon, who possessed an extraordinary voice but limited patience with repetitive processes, had been complaining about it for months. During the recording sessions for Rubber Soul in 1965 and the beginning of the Revolver sessions in 1966, Lennon repeatedly expressed the same wish to George Martin.

“I want a machine that does this for me. A machine that takes my voice and duplicates it without me having to sing it twice.” Martin listened to Lennon’s complaints with a mixture of sympathy and exasperation that the most difficult Beatle generated. He transmitted the problem to the technical department at Abbey Road.

 That problem found its way to Ken Townsend. What Townsend recalled about the moment he invented what would become known as automatic double tracking is one of the most extraordinary accounts in the history of music production. They were doing Paul McCartney’s vocal doubling, sending one track through the studio via headphones, and having Paul sing over his own voice.

It was a process that consumed time and wasted a valuable track on the tape machine. Driving home in the early hours of the morning, an idea occurred to him. What if, instead of asking the singer to repeat their performance, you took the original signal of the voice and delayed it by a few milliseconds using a second tape machine? An oscillator could vary the speed of the second machine slightly, producing small fluctuations in the delay and in the tone of the copy.

 When the two signals, the original and the delayed copy, were mixed together, the result would be almost indistinguishable from a real manual doubling. Townsend came back to work the next morning, mounted the system, tested it, and it worked. That same afternoon, he demonstrated the result to the Beatles. Lennon heard his own voice processed through the new system and was left without words.

Not out of dissatisfaction, but out of something that was relatively rare in Lennon, genuine and quiet delight at something that exceeded his expectations. What Townsend does not remember is exactly what Lennon said in that moment. What he and George Martin both remembered in multiple interviews was the question Lennon asked about how the machine worked.

Martin, who had decided that the real technical description was too dry for Lennon’s sensibilities, explained the process in terms he knew Lennon would appreciate. The signal passed through a bifilar flangerlizer. It was a completely invented description. There was no bifilar flangerlizer. It was simply the type of technical language that sounded sufficiently specific and sufficiently absurd to satisfy Lennon’s curiosity without revealing that the actual process was considerably simpler than the name suggested.

Lennon adopted the phrase immediately. He started calling the system Ken’s flanger, and there are some music production historians who attribute that invented nickname to the origin of the technical term flanging, which today is used worldwide to describe a specific audio effect. The joke ended up becoming technical nomenclature.

 The term that describes one of the most important production techniques in modern music production comes from a made-up description of something that did not exist, invented as a joke to satisfy John Lennon’s curiosity. The Beatles began using ADT immediately and systematically. On Revolver, the album they were recording when Townsend invented the system, ADT appears on nearly every track.

 It is on the guitar of Taxman. It is on the backwards guitar of I’m Only Sleeping. It is on the voices of Eleanor Rigby where McCartney could not have produced that completely isolated sound above the string quartet in any other way with the same efficiency. And it is on Tomorrow Never Knows, the most experimental song on the album, where Lennon’s voice processed through ADT creates that psychedelic preacher effect that no other technique of the era could have produced.

 The spread of ADT through the music industry was almost immediate. Norman Smith, the sound engineer who had worked with the Beatles on their early albums, and who in 1967 became the producer of Pink Floyd’s debut album, The Piper at the Gates of Dawn, used ADT extensively on Syd Barrett’s vocals. The Pink Floyd case was especially interesting because Smith did not just use ADT for conventional doubling, but divided Barrett’s voice between the two stereo channels, creating the disorienting impression of two completely separate voices singing

simultaneously from opposite sides of the sonic space. On some moments of Bike, the effect is so extreme that it is almost impossible to locate the voice in space. It was exactly the type of creative use that Townshend had made possible, but probably had not completely imagined when he designed the system. What he had invented as a solution to a specific technical problem had become a new expressive palette.

David Bowie, who would record much of his most important work with engineers who had learned their trade in the Abbey Road circuit, adopted ADT as a fundamental element of his production. The voices of Ziggy Stardust, of Aladdin Sane, of Heroes have that specific texture that ADT produces. Producer Tony Visconti, who worked with Bowie on some of his most important albums, described ADT as one of the fundamental tools of his sonic palette.

 Led Zeppelin used ADT extensively from their earliest albums. Jimmy Page applied the technique not just to Robert Plant’s vocals, but to guitars, creating those layers of sound that define the band’s first two albums. ADT on guitar produced a different effect than on vocals, warmer, more physical, with that sensation that the sound occupies more space than it physically should.

 The Who used it. The Kinks adopted it. By 1968, ADT was a standard technique in British recording studios. By 1970, it was standard in American studios. By 1975, it was omnipresent in any quality rock or pop production anywhere in the world. ADT also gave rise to a family of related effects that today are part of the fundamental technology of modern music production.

 Flanging, which Lennon accidentally named with his invented description of the bifilar flangerlizer, is an extreme variation of ADT, where the delay between the two signals is modulated more aggressively, producing that characteristic sweeping effect heard in dozens of rock songs from the ’70s. Phasing is a similar variation. Chorus, heard in practically all music of the 1980s, is also a direct descendant of the principle that Townshend established that night in 1966.

That entire family of effects, all the software plugins that today process vocals and guitars in studios around the world, all the effect pedals that guitarists use in their live performances, have a common ancestor. Two Studer J37 tape machines that Ken Townshend connected at Abbey Road in the spring of 1966.

All of that emerged from one night when Ken Townshend drove home thinking about a problem that John Lennon had asked him to solve. But the most important use of ADT was not in vocals. It was in what ADT made possible as a broader artistic concept. Before ADT, doubling a vocal or instrumental part required studio time, artist time, and precious tape space.

The four-track machines with which The Beatles worked during most of their studio career did not have infinite space. Every track used for manual doubling was a track that was not available for something else. ADT freed up space. It allowed The Beatles to experiment with layers of sound in ways that would have been logistically impossible without it.

Sgt. Pepper’s Lonely Hearts Club Band, the album that many consider The Beatles’ masterpiece, would be a fundamentally different album without ADT. Not necessarily worse, but different. Because ADT was not just a production technique, it was a new sonic palette. And then the management of Abbey Road remembered it existed.

 Six months after Townshend invented the system and The Beatles had adopted it as a fundamental part of their creative process, Townshend was called into the office of the studio’s general manager. The manager told him that he should not use the technique until it had been technically approved by the appropriate engineers, that the approval process would take time, that until then the use of ADT should be suspended.

That same night The Beatles used ADT again. It was the type of bureaucratic paradox that only exists in institutions too large for the right hand to know what the left hand is doing. The technical engineer had invented something that the company’s most important artists had adopted immediately.

 Management found out six months late, and the first thing they did was try to stop it. And The Beatles, who probably knew nothing about the conversation between Townshend and his manager, continued using it because it was exactly the tool they needed. The technical approval process eventually completed. ADT was officially sanctioned, and the world continued hearing it without knowing it existed.

Ken Townshend remained at Abbey Road his entire working life. He was promoted to technical director and eventually to managing director of the studio in 1974. In that role, he made the decision that perhaps was his most important contribution after ADT. In 1976, he changed the official name of the studios from EMI Recording Studios to Abbey Road Studios.

It was a marketing move that any 21st century brand consultant would have recognized as brilliant. The studios had been associated with the Beatles in the public consciousness for decades, but the official name did not reflect that association. The cover of the Beatles final album, released in 1969, showed the four crossing the street in front of the building.

It was probably the most reproduced image of any album cover in history. And the name that the world used to refer to that image, Abbey Road, was not the official name of the studio. Townsend saw that the name Abbey Road was a brand of incalculable value that the company was not using and changed it.

 The renaming worked in ways that exceeded any expectation. Abbey Road Studios became the most famous recording studio in the world, not just because of the music that had been recorded there, but because of the name it carried. Waitlist for recording in the studio extended for years. Audio effects company Waves released a plugin called Abbey Road ADT, paying royalties to the studios for using the name.

The pedestrian crossing in front of the building became one of the most photographed tourist destinations in London with security cameras installed to stream real-time images worldwide of fans recreating the photo from the album cover. Under Townsend’s direction, Abbey Road also established a partnership with the film industry that transformed the studios economic profile.

In 1980, when Townsend established a collaboration with Amblin Postproduction, Abbey Road began attracting film soundtrack projects that consolidated its global reputation. Since then, the studio has recorded soundtracks for Raiders of the Lost Ark, Return of the Jedi, and the Lord of the Rings trilogy, among dozens of other major film projects.

It was exactly the diversification that a studio whose name evoked the 1960s needed to survive in the decades that followed. And it was Townshend, the same man who had invented ADT one night in 1966, who designed that survival strategy. The technical legacy of ADT did not end with tape machines.

 In the decades that followed, with the transition from analog to digital recording, sound engineers attempted to replicate the effect of ADT using electronic and then digital means. The results were functional, but engineers who had worked with Townshend’s original system detected a difference. Tape ADT had a specific quality, a warmth and organic irregularity that emerged from the physical imperfections of the machines that electronic and digital systems could not completely reproduce.

When audio software company Waves decided to create a plugin based on the original Abbey Road ADT, they consulted Townshend’s original technical records and collaborated with the studio engineers who had worked with the system in the 1960s. The result was the Abbey Road ADT, one of the most valued plugins in the professional music production industry.

Townshend’s name appears in the credits for development of the plugin. It is the only place where Ken Townshend’s name appears in something the general public can see directly. Ken Townshend retired as chairman of the studio group in 1995. He had spent 41 years at Abbey Road. He had been present at the first Beatles session on June 6th, 1962, when he remembered the sound of McCartney’s amplifier collapsing on the studio floor like a gigantic noise of flatulence.

He had been present at the final Abbey Road sessions in August 1969 when the four Beatles, already in the process of separating, but still capable of making something extraordinary together, recorded what would turn out to be their last album together. Throughout that entire career, 41 years in the same building, Townsend never received royalties for ADT.

It was not his invention in the legal sense. He had created it during his working hours using his employer’s equipment to solve his employer’s problem. The intellectual property belonged to EMI. What Townsend received was the recognition of his colleagues and eventual promotion, the satisfaction of having created something the world used for decades.

The difference between Ken Townsend and the invisible session musicians that appear in these stories is that Townsend did receive recognition from the people he worked with. George Martin called him one of the most important men at Abbey Road. Lennon gave him his nickname. The Beatles knew his name.

 They simply did not tell the world. ADT continues to be used today, not in Townsend’s original form with two Studer J37 tape machines connected by an oscillator, but in the form of software plugins that simulate the process that Townsend described mathematically and mechanically one night while driving home. The Waves Abbey Road ADT plugin, which specifically models Townsend’s system, has Townsend in its development credits.

It is perhaps the only time Ken Townsend’s name appears in something the general public can see directly in the credits of a software plugin that most people will never read. There is a voice in all Beatles albums from Revolver onward that is not exactly the voice of the singer. It is the voice processed by the system that Ken Townsend invented one spring night in 1966 while driving home.

The world has been hearing it for almost 60 years and almost nobody knows who invented it. There is a technical term used everywhere in music production today that is named after something that was never invented. The term is flanging. The thing that was never invented is a bifilar flangerlizer. This is how revolutions in music production happen.

 Not with fanfare, not with announcements, but with a tired engineer driving home thinking about a problem and waking up the next morning with a solution. A solution so perfect that nobody ever questions whether it should exist. A solution so ubiquitous that the world forgets someone had to invent it. Ken Townsend invented something that changed music forever.

 And the world forgot his name almost immediately. He did not mind. He was one of the backroom boys. That was what he did. He made it possible for others to create while remaining invisible himself. The voice that is not quite the singer’s voice, that is everywhere in rock music from 1966 onward, is the sound of Ken Townsend’s invisibility.

It is the sound of someone solving a problem so well that the solution became invisible. It is the sound of one of the most important technical innovations in music history, and almost nobody knows who created it.