YAMAHA S90

The Yamaha Music Synthesizer S90 is a synthesizer and a MIDI controller in one unit, released in 2002 to supersede the S80. As such, it is part of the S series together with the S03 and S08. It was superseded by the S90ES in 2005, itself superseded by the S90XS in 2009. The S90 provides 88 fully weighted keys, the number equivalent to a standard piano, emulating the pianistic mechanism. The keyboard naturally provides initial touch, but also aftertouch response and has a 64-note polyphony with 16 multitimbral parts providing a maximum of 4 performance parts.