Don't necro old build threads to ask for help pls, you can make your own thread for that. To answer your question, I'm guessing from the google translate spaghet that you want digital volume control, so you'll want to get an amp like this one.xck is a fantastic project compliments I like a casino I wanted to ask you a question, since I'm literally going crazy to control the volume with the keys, I wanted to know how it works which audio chip I have to buy and what steps I have to take if you can let me explain politely how increase and decrease the volume by keys I would be grateful.