Today whilst editing, I found myself chasing a tiny detail that turned out to be surprisingly important: the sounds made by an old British telephone box.

In one scene, Buster is calling the United States when his money runs out. The call ends abruptly — not with a tidy click, but with those unmistakable pips and the return of the dial tone. If you remember Britain around 1980, you may know exactly the sound I mean. It is a small, stern electronic warning, but it carries an entire world with it: coins, time running out, and the particular anxiety of making an expensive international call.

I assumed finding a usable recording would be simple. It was not. The only version I could locate online was rather crackly, more archaeological evidence than production sound.

Then I came across this remarkable YouTube video, featuring a very rare vinyl record made to document telephone tones. What fascinated me was that it did not simply preserve the noises (albeit in not great quality as you can imagine): it described how they were constructed. It gave me the necessary details on the electronic tones with their particular pitches, durations and patterns.

That was enough to send me to my trusty Roland Juno-60 analogue synthesiser. Rather than clean up a damaged recording, I rebuilt the sounds from the ground up — shaping the tones and their timing until they had that familiar, wonderfully unfriendly telephone-box character. There is something deeply satisfying about recreating a sound that was once completely ordinary, yet has now become so bound up with a particular time and place.

As a small treat for fellow sound nerds, filmmakers and anyone else in need of an authentic early-1980s British phone-box interruption, I’m leaving the recreated sounds here for you to use royalty-free in your own projects.

Who knows — perhaps they will become the new Wilhelm scream.