This Yamaha drum machine is MIDI out into the keyboard. The drum sounds come from the keyboard proccessors. (from Yamaha) "The DD-55 is a digital drumkit with seven touch sensitive pads. 75 high quality drum and percussion sounds are mixed with 20 orchestra voices to provide a wide range of musical opportunities. MIDI In/Out function makes recording to a PC easy. Digital Reverb gives a big sound."
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