The EAD10 features a talkback function. A player's voice can be captured by the microphone sensor of the unit sensor by operating the buttons on the main unit, or by using the pedal.
This function can be used in various circumstances, including video creation and web lessons.
Learn more about EAD10: https://www.yamaha.com/ead/
EAD10 Web Manual: https://manual.yamaha.com/mi/bo/ead10/