The Yamaha TX7 is a MIDI-compatible synthesizer. It's a sound module derived from the company's DX7 synthesizer, featuring a 6-operator FM sound engine. The TX7 is essentially the sound generation portion of the DX7, so the sound creation methods and basic performance are the same for both the TX7 and the DX7. I have confirmed that sending a signal to the MIDI IN and connecting to the OUTPUT and HEADPHONE jacks produces sound, such as piano sounds. There is some cosmetic aging. The rubber feet are sticky. Due to the age of the equipment, it is sold as-is, with no returns or claims. - Brand: Yamaha - Model Name: TX7 - Connectors: MIDI, Audio Output, Headphone - Control Buttons: Program Select, Settings - Power: AC100V 7W - Display: LCD Thank you for viewing.