Roland RA90 real-time arranger

The Roland RA90 is a real-time arranger keyboard that was released in the early 1990s. It was used by many professional musicians, including jazz keyboardist Herbie Hancock and the band Yes. The RA90 is a powerful and versatile instrument that allows users to create complex arrangements with ease. It features a built-in sequencer, a variety of sounds, and a range of effects. It also has a built-in rhythm machine and a 16-track recorder. The RA90 is capable of creating complex arrangements with multiple layers of sound, and it can be used to create a wide range of musical styles. It is also capable of creating realistic backing tracks for live performances.