2018 Sequential (DSI) Prophet 6 Keyboard Analog Synth2018 Sequential (DSI) Prophet 6 Keyboard Analog Synth Inspired by the classic Sequential Prophet 5 poly synthesizer, the Dave Smith Instruments Prophet 6 keyboard analogue synth improves on the original design with innovations such as studio quality effects, a polyphonic step sequencer and an arpeggiator that can be synched to an external MIDI clock. This six voice synth retains many of the best features of the iconic model, including true voltage