運算式 20: "f" left parenthesis, "t" , right parenthesis equals "A" times sine left parenthesis, 2 times pi times "f" Subscript, 1 , Baseline times "t" , right parenthesisft=A·sin2·π·f1·t
20
Audio Mixer - Summer
21
運算式 22: "r" left parenthesis, "t" , right parenthesis equals "f" left parenthesis, "t" , right parenthesis plus "v" left parenthesis, "t" , right parenthesisrt=ft+vt
