The Yamaha PSR-2100 is a digital keyboard synthesizer released in 2000. It is a 61-key instrument with a wide range of features, including a built-in sequencer, a variety of voices, and a range of effects. It has been used by a variety of artists, including Coldplay, The Killers, and The Chemical Brothers.
The PSR-2100 works by allowing the user to select a voice from the instrument's library of sounds. The user can then play the keyboard and the sound will be generated by the instrument. The instrument also has a range of effects, such as reverb, chorus, and delay, which can be used to further shape the sound. Additionally, the instrument has a built-in sequencer, which allows the user to record and playback their own compositions.