Related topics: Broadcasting, Recording
quad·ra·phon·ic, quadrophonic /ˌkwɒdrəˈfɒnɪk◂ $ ˌkwɑːdrəˈfɑː-/ adjectiveadj TCBTCRusing a system of sound recording, broadcasting etc in which sound comes from four different speakers at the same time 四声道(立体声)的 → mono, stereo