Roland AT-90S

The Roland AT-90S is a professional-grade, rack-mountable synthesizer module. It was released in the early 1990s and was used by many professional musicians, including Nine Inch Nails, The Prodigy, and The Chemical Brothers.

The AT-90S is a digital synthesizer that uses a combination of analog and digital synthesis techniques to create a wide range of sounds. It features two oscillators, two filters, two envelope generators, two LFOs, and a variety of modulation and effects options. It also has a built-in arpeggiator and a 16-track sequencer. The AT-90S is capable of producing a wide range of sounds, from classic analog-style leads and basses to modern digital sounds.