When was the last time when serious new instrument was invented ?

Here two instruments separated by millenia played together :

As, I think, Nietzsche said - Without music life would be an error -.

It might still be an error but perhaps less so.

Dweller, this is an extremely cool machine, and it makes some music too !

Indeed, saxophone is a serious instrument.

AI coming..I don't know what to expect, makes me kind of nervous.

Composer Harry Patch was continually inventing new instruments throughout his life! 

Maybe/probably the harpejji:

@mikelavigne:::Hendrix did NOTHING NEW,he simply COPIED/Polished Link Wray's style!!!