monophonic

adjective

1. Music. of or relating to monophony.
2. Also monaural, mono. of or noting a system of sound recording and reproduction using only a single channel.

adjective

1. Also: monaural (of a system of broadcasting, recording, or reproducing sound) using only one channel between source and loudspeakerSometimes shortened to: mono Compare stereophonic
2. music of or relating to a style of musical composition consisting of a single melodic lineSee also monody (def. 3)

adj.of recordings, broadcasts, etc., “not stereo, having only one output signal,” 1958, coined to be an opposite of stereophonic; from mono- + -phonic, from Greek phone “sound, voice” (see fame (n.)).