quadraphonic
adjective /ˌkwɒdrəˈfɒnɪk/
/ˌkwɑːdrəˈfɑːnɪk/
(also quadrophonic)
- (of a system of recording or broadcasting sound) coming from four different speakers at the same time compare mono, stereoWord Origin1960s: from quadri- ‘four’ + a shortened form of stereophonic (see stereo).