In episode 2 of Netflix’s “ Beef ,” Oscar Isaac ‘s character, Josh Martin, starts jamming on his Moog synthesizer. He’s not good at it. “It’s really amateurish,” Oscar and Grammy Award-winning songwriter Finneas says. In season 2, Josh is the general manager at an ultra-posh country club. His wife, Lindsay ( Carey Mulligan ), picks out fabrics and seems discontented with life. When young couple Ashley ( Cailee Spaeny  ) and Austin ( Charles Melton ) catch them in an all-out argument, the lower-