Yamaha reface DX Mini FM Synthesizer Yamaha groundbreaking FM synthesizers shaped the sound of the 80's like no other electronic instrument. With the reface DX, all these legendary sounds are back in the 21st century - ready for the new generation of FM sound fans. A carefully developed user interface offers intuitive access to the FM tone generators even for starters. A capacitive multi touch controller allows dynamic modifications of a sound. The reface DX is polyphonic with 8 voices and features 7 effects.