[He watches Lutha go through the roller coaster of reactions that is hearing a sound recording for the first time as well as the piano. He's smiling for sure.]

Hehe, much better right? Pianos have an incredible amount of range. They're one of the most popular instruments for a reason!

[But oh right, the tech]

It's a sound recording. My friend Alisa could explain the technology better, but basically you can capture a recording of a sound, so you can replay it as many times as you want.