>>445314

Basic math, PEMDAS is Parentheses, Exponents, Multiplication, Division, Addition, Subtraction… it's the order of completion in an equation

>>445660

Mux/demux… How do you think FM radio works? Or analog TV? Encode frequencies you wish to transmit on carrier, decode at receiver and pass to amplifier. I worked on TV/Stereo equipment until shit became throwaway.