The Yamaha DX11 (titled Yamaha V2 in Japan) is a digital synthesizer and one of the later DX-series instruments produced by Yamaha in the 1980s, having been released in 1987-1988. It is a 4-operator FM synthesis-based instrument and the keyboard version of the popular TX81Z rack module which was released one year prior. Although it was shipped with a different set of factory sounds than the TX81Z, patches from the module and Yamaha's previous 4-operator synthesizers (such as the DX21, DX27 and DX100) could be loaded and saved into the unit's internal memory.