The Yamaha QY700 is a professional-grade music workstation and sequencer released by Yamaha in 1997. It is a powerful and versatile tool for creating and arranging music, and has been used by many professional musicians and producers. The QY700 features a built-in sequencer, a variety of synthesis and sampling capabilities, and a range of effects and editing tools. It also has a built-in MIDI interface, allowing it to be connected to other MIDI-compatible devices. The QY700 is capable of creating complex musical arrangements, and its intuitive user interface makes it easy to use. It is also capable of storing up to 128 songs, and can be used to create backing tracks for live performances.