What instrument was developed during the early modern period of the twentieth century

Diferenças entre musica como arte e musica como indústria cultural

Sorry about the calculator and me asap me asap because for real like some no one answers question one for me so that's why i'm posting them over to that way someone can at least answer number two or one for me if you do you so much if you do it would be a complete big blessing to me

What is always coming, but never arrives? this is a tricky question i don’t necessarily need to know the answer because i already do but— give it your best shot