From Clavichord To The Modern Piano

Truly interesting.

Activating the resonance with the knee, though, I've never seen that!

It seems to me I understood that it can play piano and forte but it doesn't have the escapement?

Sergio wrote:

It seems to me that I understood it can play piano and forte but it doesn't have the escapement?

No no, of course it does! The guy is talking specifically about "escapement" and describes its action.

Besides, modern pianos have "double escapement" because old ones had simple escapement...

Ah yes, it's true but I saw the videos while I was working.

Nothing new but it is useful to see it:

Open content (youtube)