mon·o·phon·ic 
(mŏn′ə-fŏnĭk)
(mŏn′ə-fŏnĭk)adj.
1. Music Having a single melodic line.
2. Electronics Relating to a system of transmitting, recording, or reproducing sound in which one or more sources are connected to a single channel; monaural.
mon′o·phoni·cal·ly adv.