Acid

Today acid is more than a genre — it's an umbrella term for everything shaped by the iconic Roland TB-303.

That reach starts with acid house, one of the first electronic music genres to come out of the underground and build a subculture and scene around itself. It can be seen as the grandmother of the genres that followed in electronic music.

Acid house grew out of Chicago in the mid-to-late 1980s, a direct mutation of the house music already taking shape in the city's clubs like the Warehouse and on labels like Trax and DJ International. The Roland TB-303 bass synthesiser was the instrument at the centre of it all.

Fun fact: It was originally designed as a practice tool for guitarists, it was never quite right for that job, but in the hands of producers like DJ Pierre, Spanky and Herb J, collectively Phuture, it became something else entirely. From there the sound crossed the Atlantic fast, landing in the UK warehouse scene and becoming the engine of the late-80s rave explosion.

The defining sound is the 303 itself: a bubbling, squelching, pitch-sliding bassline that sits somewhere between a synth and something almost human due to its imperfections. The cutoff filter and resonance controls are what give acid its character, pushed to extremes to produce that sharp, wailing quality that cuts through a system. A good acid bassline has some serious power. Underneath that the Drums are typically stripped and functional. 4-on-the-floor with a snappy snare or clap, keeping the track moving while the 303 does the work. There isn't much else required. The space around the bassline is part of the point.

Acid never really went away, and the tracks that started it still hold up in a set without much apology. The 303 has been revisited by producers across techno, electro and experimental genres consistently enough that it reads less as nostalgia and more as a living tool.

At SEVEN it sits close to Chicago house and early European techno, which is exactly where it belongs. What we love especially is the sound that isn't too resonant or overproduced — those subtle basslines that turn out to be huge on the right system.