MONO             1114 libavcodec/cook.c         case MONO:
MONO              103 libavcodec/libmp3lame.c     lame_set_mode(s->gfp, avctx->channels > 1 ? s->joint_stereo ? JOINT_STEREO : STEREO : MONO);
MONO               53 libavcodec/libshine.c     s->config.mpeg.mode = avctx->channels == 2 ? STEREO : MONO;