Five Hoover sound presets demonstration from Alphatron Oscillion Polyphonic Subtractive Synthesizer VST, VST3 and Audio Unit plugin for Windows and Mac. They are the following with the timestamp included:

• 26 LEAD Hoover Apocalypse 0:00
• 27 LEAD Hoover Dominator 0:07
• 28 LEAD Hoover Gabber 0:19
• 29 LEAD Hoover Gritty 0:25
• 30 LEAD Hoover Juno Sway 0:37

The Hoover sound is commonly used in rave techno, hardcore techno, gabber, trance, breakbeat hardcore, hard house and hard NRG (nu-NRG) music. It is a convoluted waveform generated through oscillators and created by Eric Persing for the Roland Alpha Juno, but without introducing that 'hoover' term, since this name was the one likening the sound to that of a vacuum cleaner, often referred to the genericized trademark 'hoover' in the UK and Ireland.

It is traditionally created with the Roland Alpha Juno-2, Alpha Juno 1, or rack mount version MKS-50 synthesizer using the famous built-in "What the ?" patch. Alphatron Oscillion generates an emulation as accurately as possible.

Joey Beltram in "Mentasm", Prodigy in "Charly", Human Resource in "Dominator", The Bloody Beetroots "Warp" (feat. Steve Aoki), or Mundo Muzique "Acid Pandemonium", helped popularize this Techno-Rave must-have sound.
The sound has also been used in video games such as Streets of Rage 3, which was composed by Yuzo Koshiro and Motohiro Kawashima and Robotron X by Aubrey Hodges.

Synthesizer Description:

Alphatron Oscillion is a polyphonic subtractive synthesizer to produce a vast array of sounds, utilizing three main signal modules: frequency (voltage-controlled oscillator VCO), timbre (voltage-controlled filter VCF) and amplitude (voltage-controlled amplifier VCA).

Four VCOs initiate the sound waveform and control its frequency. It also determines the initial timbre by the waveform option selected (sawtooth or square). The VCF module shapes the timbre via a low-pass filter with cutoff and resonance parameters controlled by an envelope generator. The amplitude of the sound is shaped by the VCA envelope.

It generates iconic vintage synthesizer sounds with distinctive pads, peculiar keys, punchy basses, sparkle leads, creepy effects, charming ambient soundscapes or unearthly and otherworldly atmospheres. Suitable for many genres and styles of music and pliability to custom design over a diverse sonic palette.

Available as a plugin in VST and VST3 64 bit versions for Windows, as well as in Audio Unit for macOS.