Nobody Programmed the Hoover Twice: How a Joke Preset Spread as a Sample Instead of a Sound

Every genre has a signature sound that producers claim to have built themselves. The hoover is the one where almost nobody did. For thirty-five years the rave stab that opens a thousand records has travelled through hardcore, gabber, jungle, hard house, drum and bass and back into chart pop, and the overwhelming majority of those records did not program it. They sampled someone who sampled someone who sampled a factory preset that a Roland employee wrote as a joke.

The preset was never meant to be played

The Roland Alpha Juno arrived in the mid eighties as Roland’s answer to the Yamaha DX7, a cheap programmable synth whose party trick was an oscillator that could apply pulse width modulation to a sawtooth wave rather than only to a square. That is an unusual thing to be able to do, and it makes a sound that is thick and unstable in a way the analogue polysynths of the period were not.

Eric Persing, then Roland’s sound designer, filled the factory bank. One patch used that sawtooth PWM together with a hard pitch envelope, and the result was so unlike anything a keyboard player would want that Persing named it after his own reaction to it. In the manual it appears as “What The”. It was filler, the sound you demo to prove the machine can do something strange before you get back to the strings and the electric pianos. Nobody at Roland expected it to become a genre.

Mentasm turned a patch into a recording

In 1991, Joey Beltram and Mundo Muzique released “Mentasm” as Second Phase on the Belgian label R&S. The stab that runs through it is the Alpha Juno patch, but it does not sound like the Alpha Juno patch, and the reason is a studio failure. Beltram’s Macintosh and his Akai MPC60 would not sync properly, so the pair dumped the loop into a Casio FZ-1 sampler and cleaned it up and filtered it there. The machine that rescued the session also changed the sound. What came out was darker, grainier and more compressed than the preset, a churn rather than a swirl.

That distinction matters more than it looks. From that point on, the thing being copied was not a synth patch. It was one specific twelve inch.

A chain of copies, not a chain of instruments

1991 alone gave up Human Resource’s “Dominator”, a hit in several countries, T99’s “Anasthasia” and The Prodigy’s “Charly” in its Alley Cat mix. Underground Resistance used it on “Fury” in 1992. It went to the Netherlands and got faster until it was gabber. It went to the UK, got pitched up and sliced into breakbeat hardcore, and from there it settled permanently into jungle and drum and bass, where Dom & Roland’s “Thunder” is only the most cited example. Hard house made it a requirement, and by the late nineties a Tony De Vit or Lisa Lashes record without one was close to unthinkable.

At every one of those stages the sound arrived as a sample. Producers lifted it off Mentasm, or off a record that had lifted it off Mentasm, then pitched it, filtered it and layered it. The Alpha Juno was sitting in shops the whole time. Very few people bothered.

Why the sample beat the instrument

The obvious explanation is money, and it is partly right. A secondhand Juno cost more than a blank DAT. The better explanation is that the sample carried information the preset did not. Beltram’s version had the FZ-1’s converters in it, the filtering, the specific note and envelope he chose. A producer starting from the preset would have to make all those decisions again and would probably get them wrong. A producer starting from the record inherited a finished artistic judgement for free.

This is what separates the hoover from something like the TB-303 acid line, which its users genuinely re-programmed. The hoover behaves less like an instrument and more like the Amen break, a fixed recording that an entire scene agreed to treat as raw material.

It is still moving. Jlin used one on “Hatshepsut” in 2017, Justice on “Generator” in 2024, Lady Gaga on “Abracadabra” in 2025. Persing has spent decades being told that the throwaway he called “What The” is the most influential thing he ever made. Both halves of that sentence are true, and only one of them was intentional.

Sources: Wikipedia (Hoover sound, Roland Alpha Juno), Sonicstate, gearnews.com, Red Bull Music Academy Daily, Discogs, and Simon Reynolds, Generation Ecstasy.