The E-mu Systems XK-6 Xtreme Keys is a professional keyboard controller designed for use in the studio or on stage. It features 61 semi-weighted keys, aftertouch, and a variety of control knobs, sliders, and buttons. It also includes a built-in arpeggiator, a sequencer, and a USB port for connecting to a computer.
The Korg X5DR is a synthesizer and digital music workstation released by Korg in 1995. It features a 61-key keyboard, a built-in sequencer, and a variety of sounds and effects. It was popular with musicians and producers in the 1990s and is still sought after by vintage synth enthusiasts.
The Korg X50 is a 61-key synthesizer workstation released by Korg in 2006. It features a built-in 16-track sequencer, a variety of sounds, and a variety of effects. It is capable of producing a wide range of sounds, from acoustic instruments to synthesized sounds.
The Korg X3R is a 61-key synthesizer and MIDI controller released by Korg in 1994. It features a variety of sounds, effects, and sequencing capabilities, as well as a built-in 16-track sequencer. It also has a built-in arpeggiator and a variety of performance controls.
The Korg X3 is a music synthesizer and workstation released by Korg in 1993. It features a 61-key velocity-sensitive keyboard, 16-track sequencer, and a variety of built-in sounds. It was the successor to the popular Korg M1 and was widely used by professional musicians and producers in the 1990s.