JD-Xi Interactive Analog/Digital Crossover Synthesizer Analog and digital synths in one standalone keyboard With its unique crossover sound engine, the JD-Xi is the best of both worlds. The warm, smooth response of a classic analog synth section features saw, triangle and square waveforms, with pulse-width modulation and an analog filter, plus an independent sub oscillator for low-end power. Meanwhile, two digital synth sections offer a wide range of high-quality SuperNATURAL synth tones, includ